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Super Gemmy Strands

The Super Gemmy collection is where we showcase the best of the best—premium strands chosen for unmatched transparency, saturation, and polish. Each bead is cut from rare, top-grade rough that represents less than 1% of what is mined, then strand-matched for consistent color, quality and sparkle.

Because these strands sit at the pinnacle of our lineup, quantities are limited and prices reflect their rarity. Expect vivid emeralds, colorful tourmalines, bright Rubys, and other collector-level gems that are rare in beads. If you want statement pieces that turn heads and hold value, Super Gemmy strands deliver the ultimate upgrade for your designs.

Products: 77

Ruby (Natural) 2-6mm Graduated Faceted Rondelle - 15-16 Inch

Original price $239.00 - Original price $239.00
Original price $239.00
$239.00
$239.00 - $239.00
Current price $239.00

Ruby is a precious gemstone known for its deep red color. It is a variety of the mineral corundum, the second-hardest mineral next to diamond . The...

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Original price $239.00 - Original price $239.00
Original price $239.00
$239.00
$239.00 - $239.00
Current price $239.00

Sapphire 2-6mm Graduated Faceted Rondelle - 18 Inch

Original price $163.00 - Original price $163.00
Original price $163.00
$163.00
$163.00 - $163.00
Current price $163.00

Sapphires are precious gemstones, but unlike rubies, they come in a rainbow of colors besides red! They are all varieties of the mineral corundum,...

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Original price $163.00 - Original price $163.00
Original price $163.00
$163.00
$163.00 - $163.00
Current price $163.00

Champagne Garnet 3-6mm Graduated Faceted Rondelle - 17-18 Inch

Original price $580.00 - Original price $580.00
Original price $580.00
$580.00
$580.00 - $580.00
Current price $580.00

Garnets are a group of silicate minerals that have been used since the Bronze Age as gemstones and abrasives. All species of garnets possess simila...

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Original price $580.00 - Original price $580.00
Original price $580.00
$580.00
$580.00 - $580.00
Current price $580.00

Labradorite 4-5x7-9mm Faceted Irregular Rondelle AAA Grade Beads - 10-Inch

Original price $99.00 - Original price $99.00
Original price $99.00
$99.00
$99.00 - $99.00
Current price $99.00

Labradorite is remarkable for the way its aggregate layers refract light, creating iridescent flashes of blue, gold, pale green or copper red. This...

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Original price $99.00 - Original price $99.00
Original price $99.00
$99.00
$99.00 - $99.00
Current price $99.00

Diamond 2-4mm Chip Black- 15-16 Inch

Original price $116.00 - Original price $116.00
Original price $116.00
$116.00
$116.00 - $116.00
Current price $116.00

Diamond is a rare, naturally occurring mineral composed of pure carbon. Although most people think of diamonds as colorless, they actually occur i...

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Original price $116.00 - Original price $116.00
Original price $116.00
$116.00
$116.00 - $116.00
Current price $116.00

Lavender Amethyst 8mm Banded Faceted Tyre - 15-16 Inch

Original price $168.00 - Original price $168.00
Original price $168.00
$168.00
$168.00 - $168.00
Current price $168.00

Lavender Amethyst is a transparent lavender variety of Amethyst, which forms in geodes and is generally found in clusters of crystal points. The pr...

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Original price $168.00 - Original price $168.00
Original price $168.00
$168.00
$168.00 - $168.00
Current price $168.00

Kingman Turquoise 4-6 Graduated Faceted Rondelle - 16-17 Inch

Original price $500.00 - Original price $500.00
Original price $500.00
$500.00
$500.00 - $500.00
Current price $500.00

Kingman turquoise, mined in the Acerbate Mountains near Kingman, Arizona, is renowned for its vibrant, intense blue hues, often featuring a black, ...

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Original price $500.00 - Original price $500.00
Original price $500.00
$500.00
$500.00 - $500.00
Current price $500.00

Orange Garnet 3-6mm Graduated Faceted Rondelle - 15-16 Inch

Original price $261.00 - Original price $261.00
Original price $261.00
$261.00
$261.00 - $261.00
Current price $261.00

Orange or Hessonite Garnet is sometimes called “Cinnamon Stone” for its orange to orange to brown color as well as for its origin in the land of sp...

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Original price $261.00 - Original price $261.00
Original price $261.00
$261.00
$261.00 - $261.00
Current price $261.00

Kyanite 3-5mm Graduated Faceted Rondelle - 15-16 Inch

Original price $192.00 - Original price $192.00
Original price $192.00
$192.00
$192.00 - $192.00
Current price $192.00

Kyanite often occurs as long, bladed, striated crystals, transparent or translucent with a pearly luster. An aluminum silicate mineral, it may appe...

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Original price $192.00 - Original price $192.00
Original price $192.00
$192.00
$192.00 - $192.00
Current price $192.00

Pakimer Quartz 4-7x6-8mm Point Beads - 15-16 Inch

Original price $99.00 - Original price $99.00
Original price $99.00
$99.00
$99.00 - $99.00
Current price $99.00

Pakimer Quartz is Herkimer style Quartz from Pakistan

Original price $99.00 - Original price $99.00
Original price $99.00
$99.00
$99.00 - $99.00
Current price $99.00

Australian Boulder Opal 6-14mm Graduated Coin Necklace - 15-16 Inch

Original price $697.00 - Original price $697.00
Original price $697.00
$697.00
$697.00 - $697.00
Current price $697.00

Boulder Opal is a golden-brown to dark brown stone, displaying these colors in patterns of parallel bands. It is considered a precious Opal, and fo...

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Original price $697.00 - Original price $697.00
Original price $697.00
$697.00
$697.00 - $697.00
Current price $697.00

Citrine 8mm Banded Faceted Tyre - 15-16 Inch

Original price $161.00 - Original price $161.00
Original price $161.00
$161.00
$161.00 - $161.00
Current price $161.00

Citrine is a transparent Quartz, ranging in color from pale yellow to golden yellow, honey or brown, giving it a similar appearance to Topaz. It ma...

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Original price $161.00 - Original price $161.00
Original price $161.00
$161.00
$161.00 - $161.00
Current price $161.00

Black Diamond 2mm Cube - Limited Editions

Original price $997.00 - Original price $997.00
Original price $997.00
$997.00
$997.00 - $997.00
Current price $997.00

Diamond is a rare, naturally occurring mineral composed of pure carbon. Although most people think of diamonds as colorless, they actually occur i...

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Original price $997.00 - Original price $997.00
Original price $997.00
$997.00
$997.00 - $997.00
Current price $997.00

Madagascar Moonstone 5x6-7x9mm Graduated Flat Oval - 15-16 Inch

Original price $398.00 - Original price $398.00
Original price $398.00
$398.00
$398.00 - $398.00
Current price $398.00

Moonstone naturally occurs in a broad spectrum of colors, but is most commonly associated with white, gray and peach. It's soft chatoyancy is remin...

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Original price $398.00 - Original price $398.00
Original price $398.00
$398.00
$398.00 - $398.00
Current price $398.00

Grey Diamond 2-3mm Rough Nugget - 15-16 Inch

Original price $384.00 - Original price $384.00
Original price $384.00
$384.00
$384.00 - $384.00
Current price $384.00

Diamond is a rare, naturally occurring mineral composed of pure carbon. Although most people think of diamonds as colorless, they actually occur i...

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Original price $384.00 - Original price $384.00
Original price $384.00
$384.00
$384.00 - $384.00
Current price $384.00

Diopside 4x6-8x12mm Graduated Top Drill Drop - 15-16 Inch

Original price $522.00 - Original price $522.00
Original price $522.00
$522.00
$522.00 - $522.00
Current price $522.00

Diopside is a calcium and magnesium silicate mineral. It is transparent or translucent, and can display a nearly emerald green color due to the pre...

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Original price $522.00 - Original price $522.00
Original price $522.00
$522.00
$522.00 - $522.00
Current price $522.00

Sonoran Mountain Turquoise 8-9mm Nugget - 17-18 Inch

Original price $564.00 - Original price $564.00
Original price $564.00
$564.00
$564.00 - $564.00
Current price $564.00

Sonoran Mountain Turquoise is a high-quality turquoise variety mined in Sonora, Mexico. It often features a mix of vibrant blue and green hues, som...

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Original price $564.00 - Original price $564.00
Original price $564.00
$564.00
$564.00 - $564.00
Current price $564.00

Australian Boulder Opal 8-9mm Round Necklace - 15-16 Inch

Original price $348.00 - Original price $348.00
Original price $348.00
$348.00
$348.00 - $348.00
Current price $348.00

Boulder Opal is a golden-brown to dark brown stone, displaying these colors in patterns of parallel bands. It is considered a precious Opal, and fo...

View full details
Original price $348.00 - Original price $348.00
Original price $348.00
$348.00
$348.00 - $348.00
Current price $348.00

Australian Boulder Opal 5-6mm Round Necklace - 15-16 Inch

Original price $335.00 - Original price $335.00
Original price $335.00
$335.00
$335.00 - $335.00
Current price $335.00

Boulder Opal is a golden-brown to dark brown stone, displaying these colors in patterns of parallel bands. It is considered a precious Opal, and fo...

View full details
Original price $335.00 - Original price $335.00
Original price $335.00
$335.00
$335.00 - $335.00
Current price $335.00

Blue Nepal Kyanite 3x6-5x8mm Grauated Faceted Rondelle Necklace - 15-16 Inch

Original price $390.00 - Original price $390.00
Original price $390.00
$390.00
$390.00 - $390.00
Current price $390.00

Kyanite often occurs as long, bladed, striated crystals, transparent or translucent with a pearly luster. An aluminum silicate mineral, it may appe...

View full details
Original price $390.00 - Original price $390.00
Original price $390.00
$390.00
$390.00 - $390.00
Current price $390.00

Ruby (Natural) 3mm Faceted Rondelle - 15-16 Inch

Original price $224.00 - Original price $224.00
Original price $224.00
$224.00
$224.00 - $224.00
Current price $224.00

Ruby is a precious gemstone known for its deep red color. It is a variety of the mineral corundum, the second-hardest mineral next to diamond . The...

View full details
Original price $224.00 - Original price $224.00
Original price $224.00
$224.00
$224.00 - $224.00
Current price $224.00

SHOW Green Chevron Tube Trade Beads 18mm 28"

Regular Price $300.00
Original price $300.00 - Original price $300.00
Original price $300.00
Current price $89.00
$89.00 - $89.00
Current price $89.00

Regular Price $300.00
Original price $300.00 - Original price $300.00
Original price $300.00
Current price $89.00
$89.00 - $89.00
Current price $89.00
Sale Sale

Australian Chrysoprase 14mm Round AA Grade - 15-16 Inch

Original price $292.00 - Original price $292.00
Original price $292.00
$292.00
$292.00 - $292.00
Current price $292.00

Chrysoprase is a bright apple green, translucent stone, whose color often caused ancient jewelers to confuse it with Emerald. A cryptocrystalline C...

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Original price $292.00 - Original price $292.00
Original price $292.00
$292.00
$292.00 - $292.00
Current price $292.00

Multi Sapphire (Natural) 2-4mm Banded Faceted Drop - 15-16 Inch

Original price $447.00 - Original price $447.00
Original price $447.00
$447.00
$447.00 - $447.00
Current price $447.00

Sapphires are precious gemstones, but unlike rubies, they come in a rainbow of colors besides red! They are all varieties of the mineral corundum,...

View full details
Original price $447.00 - Original price $447.00
Original price $447.00
$447.00
$447.00 - $447.00
Current price $447.00

Green Amethyst 5-7x9-10mm Faceted Irregular Rondelle Bead - 8-Inch

Original price $99.00 - Original price $99.00
Original price $99.00
$99.00
$99.00 - $99.00
Current price $99.00

Amethyst is a beautiful stone (normally purple), known as a “Gem of Fire” by ancient cultures. It has been greatly sought after throughout history ...

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Original price $99.00 - Original price $99.00
Original price $99.00
$99.00
$99.00 - $99.00
Current price $99.00

Tanzanite 1-2x3mm Faceted Rondelle Bead - 15-16 Inch

Original price $99.00 - Original price $99.00
Original price $99.00
$99.00
$99.00 - $99.00
Current price $99.00

Tanzanite is both extremely rare and extremely attractive, and we offer it when we can.

Original price $99.00 - Original price $99.00
Original price $99.00
$99.00
$99.00 - $99.00
Current price $99.00

Red Garnet 1-3x6mm Faceted Irregular Tyre Bead - 15-16 Inch

Original price $119.00 - Original price $119.00
Original price $119.00
$119.00
$119.00 - $119.00
Current price $119.00

Red Garnet is the most commonly known type of Garnet, which occurs in many colors. Garnet has been used for adornment and spirituality by myriad cu...

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Original price $119.00 - Original price $119.00
Original price $119.00
$119.00
$119.00 - $119.00
Current price $119.00

Amethyst 2-3x6-7mm Faceted Irregular Banded Tyre Bead - 15-16 Inch

Original price $119.00 - Original price $119.00
Original price $119.00
$119.00
$119.00 - $119.00
Current price $119.00

Amethyst is a beautiful purple stone, known as a “Gem of Fire” by ancient cultures. It has been greatly sought after throughout history and was at ...

View full details
Original price $119.00 - Original price $119.00
Original price $119.00
$119.00
$119.00 - $119.00
Current price $119.00

Pakimer Quartz 5-8x7-15mm Point Beads - 15-16 Inch

Original price $59.00 - Original price $59.00
Original price $59.00
$59.00
$59.00 - $59.00
Current price $59.00

Pakimer Quartz is Herkimer style Quartz from Pakistan

Original price $59.00 - Original price $59.00
Original price $59.00
$59.00
$59.00 - $59.00
Current price $59.00

Pakimer Quartz 4-7x6-8mm Point Beads - 8-Inch

Original price $54.00 - Original price $54.00
Original price $54.00
$54.00
$54.00 - $54.00
Current price $54.00

Pakimer Quartz is Herkimer style Quartz from Pakistan

Original price $54.00 - Original price $54.00
Original price $54.00
$54.00
$54.00 - $54.00
Current price $54.00

Multi Tourmaline 2-3x4-5mm Banded Faceted Rondelle Beads - 15-16 Inch

Original price $119.00 - Original price $119.00
Original price $119.00
$119.00
$119.00 - $119.00
Current price $119.00

Tourmaline is classified as a semiprecious stone and occurs in a vast array of colors, everything from colorless to black, from pastel to bright to...

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Original price $119.00 - Original price $119.00
Original price $119.00
$119.00
$119.00 - $119.00
Current price $119.00

Rainbow Moonstone 4-6x8-9mm Rainbow Faceted Rondelle Beads - 8-Inch

Original price $119.00 - Original price $119.00
Original price $119.00
$119.00
$119.00 - $119.00
Current price $119.00

Moonstone naturally occurs in a broad spectrum of colors, but is most commonly associated with white, gray and peach. It's soft chatoyancy is remin...

View full details
Original price $119.00 - Original price $119.00
Original price $119.00
$119.00
$119.00 - $119.00
Current price $119.00

Multi Tourmaline 2-4x5-6mm Banded Faceted Rondelle Beads - 15-16 Inch

Original price $65.00 - Original price $65.00
Original price $65.00
$65.00
$65.00 - $65.00
Current price $65.00

Tourmaline is classified as a semiprecious stone and occurs in a vast array of colors, everything from colorless to black, from pastel to bright to...

View full details
Original price $65.00 - Original price $65.00
Original price $65.00
$65.00
$65.00 - $65.00
Current price $65.00

Kyanite 2-3x3-5mm Graduated Irregular Rondelle Beads - 15-16 Inch

Original price $119.00 - Original price $119.00
Original price $119.00
$119.00
$119.00 - $119.00
Current price $119.00

Kyanite often occurs as long, bladed, striated crystals, transparent or translucent with a pearly luster. An aluminum silicate mineral, it may appe...

View full details
Original price $119.00 - Original price $119.00
Original price $119.00
$119.00
$119.00 - $119.00
Current price $119.00

Persian Turquoise 5-6x8-10mm Irregular Tube Beads - 15-16 Inch

Original price $119.00 - Original price $119.00
Original price $119.00
$119.00
$119.00 - $119.00
Current price $119.00

Persian turquoise is not only a pretty rock. It is a piece of history. It tells about kings, mines, art, and old trade. It holds the stories of peo...

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Original price $119.00 - Original price $119.00
Original price $119.00
$119.00
$119.00 - $119.00
Current price $119.00

Persian Turquoise 3-5x8mm Irregular Heishi Beads - 14-15 Inch

Original price $119.00 - Original price $119.00
Original price $119.00
$119.00
$119.00 - $119.00
Current price $119.00

Persian turquoise is not only a pretty rock. It is a piece of history. It tells about kings, mines, art, and old trade. It holds the stories of peo...

View full details
Original price $119.00 - Original price $119.00
Original price $119.00
$119.00
$119.00 - $119.00
Current price $119.00

Pakimer Quartz 10-12x12-15mm Faceted Nugget Beads - 15-16 Inch

Original price $124.00 - Original price $124.00
Original price $124.00
$124.00
$124.00 - $124.00
Current price $124.00

Pakimer Quartz is Herkimer style Quartz from Pakistan

Original price $124.00 - Original price $124.00
Original price $124.00
$124.00
$124.00 - $124.00
Current price $124.00

Pakimer Quartz 5-6x9-11mm Center Drilled Points Beads - 15-16 Inch

Original price $152.00 - Original price $152.00
Original price $152.00
$152.00
$152.00 - $152.00
Current price $152.00

Pakimer Quartz is Herkimer style Quartz from Pakistan

Original price $152.00 - Original price $152.00
Original price $152.00
$152.00
$152.00 - $152.00
Current price $152.00

Sunstone Natural 8X10mm Freeform Nugget - 15-16 Inch

Original price $120.00 - Original price $120.00
Original price $120.00
$120.00
$120.00 - $120.00
Current price $120.00

Sunstone, a variety of Feldspar, is aptly named for its shades of gold, orange, red and brown, as well as its iridescent sparkle. As the stone catc...

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Original price $120.00 - Original price $120.00
Original price $120.00
$120.00
$120.00 - $120.00
Current price $120.00

Chrysoprase 10x12-12x16 Drop 8-Inch

Original price $152.00 - Original price $152.00
Original price $152.00
$152.00
$152.00 - $152.00
Current price $152.00

Chrysoprase is a bright apple green, translucent stone, whose color often caused ancient jewelers to confuse it with Emerald. A cryptocrystalline C...

View full details
Original price $152.00 - Original price $152.00
Original price $152.00
$152.00
$152.00 - $152.00
Current price $152.00

Sapphire Faceted Hexagon & Hex tubes 15-16 Inch

Original price $126.00 - Original price $126.00
Original price $126.00
$126.00
$126.00 - $126.00
Current price $126.00

Sapphires are precious gemstones, but unlike rubies, they come in a rainbow of colors besides red!  They are all varieties of the mineral corundum,...

View full details
Original price $126.00 - Original price $126.00
Original price $126.00
$126.00
$126.00 - $126.00
Current price $126.00

Muonionalusta Meteorite 12mm Rose Gold Pyramid Pendant - DSPremier

Original price $174.00 - Original price $174.00
Original price $174.00
$174.00
$174.00 - $174.00
Current price $174.00

All gemstones are fascinating and special. They come from far-away, remote parts of the globe. These Muonionalusta Meteorite beads, however, are mo...

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Original price $174.00 - Original price $174.00
Original price $174.00
$174.00
$174.00 - $174.00
Current price $174.00

Cat's Eye A-Grade, Banded 6mm Round - 15-16 Inch

Original price $136.00 - Original price $136.00
Original price $136.00
$136.00
$136.00 - $136.00
Current price $136.00

Cat’s Eye is a quartz stone that appears in a range of colors including white, gray, green, yellow and brown. The fibrous asbestos inclusions in th...

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Original price $136.00 - Original price $136.00
Original price $136.00
$136.00
$136.00 - $136.00
Current price $136.00

Ethiopian Opal 4-9mm Heart Black - 15-16 Inch

Original price $210.00 - Original price $210.00
Original price $210.00
$210.00
$210.00 - $210.00
Current price $210.00

Ethiopian Opal was first discovered in Ethiopia in 1994, with additional major finds in 2008 and 2013. Beautiful specimens of Precious Opal, Fire O...

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Original price $210.00 - Original price $210.00
Original price $210.00
$210.00
$210.00 - $210.00
Current price $210.00

Gem Silica Small 3pc Slab

Regular Price $213.00
Original price $213.00 - Original price $213.00
Original price $213.00
Current price $64.00
$64.00 - $64.00
Current price $64.00

Gem Silica is the rarest and highest form of Chrysocolla, crystallized and infused in Quartz. Gem Silica occurs in a vivid blue green color due to ...

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Regular Price $213.00
Original price $213.00 - Original price $213.00
Original price $213.00
Current price $64.00
$64.00 - $64.00
Current price $64.00
Sale Sale

K2 10mm Round - 15-16 Inch

Original price $204.00 - Original price $204.00
Original price $204.00
$204.00
$204.00 - $204.00
Current price $204.00

K2 is a stone recently discovered in the foothills of the mountain for which it is named, K2, in the Karakoram mountain range of Pakistan. It is a ...

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Original price $204.00 - Original price $204.00
Original price $204.00
$204.00
$204.00 - $204.00
Current price $204.00

Ethiopian Opal 4x9-12mm Pear Black - 15-16 Inch

Original price $210.00 - Original price $210.00
Original price $210.00
$210.00
$210.00 - $210.00
Current price $210.00

Ethiopian Opal was first discovered in Ethiopia in 1994, with additional major finds in 2008 and 2013. Beautiful specimens of Precious Opal, Fire O...

View full details
Original price $210.00 - Original price $210.00
Original price $210.00
$210.00
$210.00 - $210.00
Current price $210.00

Black Spinel 15mm Pinwheel - 8 Inch

Regular Price $123.00
Original price $123.00 - Original price $123.00
Original price $123.00
Current price $49.00
$49.00 - $49.00
Current price $49.00

Spinel is a hard vitreous magnesium aluminum oxide, and comes in a range of other colors, but those varieties are transparent. Black Spinel not onl...

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Regular Price $123.00
Original price $123.00 - Original price $123.00
Original price $123.00
Current price $49.00
$49.00 - $49.00
Current price $49.00
Sale Sale

Frequently asked questions

  • What does 'super gemmy' mean on a Dakota strand?
    Super gemmy describes the clearest, most saturated material we stock in a given variety — high transparency where the species allows it, strong even color, clean faceting, and tight calibration bead-to-bead. The bar is relative to the stone: a super gemmy Aquamarine reads watery and bright, while a super gemmy Turquoise reads dense, even blue with controlled matrix. It is a clarity-and-cut descriptor, not a treatment claim or a lab grade. Specifics — origin, exact size range, treatment, and matrix character — should appear on the individual listing. Ask before buying if any of those details aren't specified for the strand you're considering.
  • What stones show up most in this selection?
    Turquoise leads the hub, with Sonoran Turquoise broken out separately. Opal, Sapphire, Ruby, and Diamond are well-represented in microfaceted rondelles and smaller rounds. Aquamarine, Moonstone, Labradorite, and Amethyst round out the colored-stone side. Cuts skew toward faceted rondelle, rondelle, and round, with teardrops, ovals, cubes, and pebble/nugget shapes filling in. Sizes run small — 3mm, 3–4mm, 3–6mm, 5mm, 6mm, and 8–9mm are the most common tags — which is typical for high-clarity faceted material. Use the stone and cut filters to narrow to a specific variety or shape.
  • How tightly calibrated and matched are these strands?
    Faceted rondelles and rounds in this hub are calibrated to a tagged size or range — 3mm, 5mm, 6mm, 8–9mm, and so on — with bead-to-bead variation tight enough for symmetrical designs. Color and clarity are matched within the strand more closely than in the standard faceted catalog, which is part of what puts a strand here. Pebble, nugget, and chip cuts are not calibrated by nature; they're included when the material itself is high-clarity. Exact strand length, bead count, and drill size should be disclosed — confirm before buying if your design needs a specific count.
  • How is this different from the standard faceted catalog?
    The standard faceted catalog covers the full range of color and clarity Dakota stocks for each variety — useful when matrix, included material, or mixed-tone strands fit the design. Super Gemmy is a narrower cut of the same catalog: strands pulled for top clarity, strongest saturation, and tightest calibration in their species. Expect smaller average bead sizes, since high-clarity rough is more often cut into 3–6mm rondelles than large rounds. Pricing reflects the material, not a tier label. If you want the variety but not the clarity bar, the main stone collection will have more options at a wider range of price points.
  • What treatments are common on high-clarity faceted material?
    High-clarity strands often involve treatment — it's standard trade practice and not a defect. Sapphire and Ruby are commonly heat-treated to stabilize color. Turquoise is frequently stabilized to hold up to drilling and wear; natural undyed material is less common and usually labeled as such. Opal may be impregnated or left untreated depending on type. Aquamarine is routinely heated. Emerald, when present, is typically oiled. Treatment should appear on the individual listing — ask before buying if it isn't specified, especially if you're disclosing to retail customers under FTC guidelines.