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16-Inch Gemstones

The 16-inch strand is the industry standard—and no one stocks more of them than Dakota Stones. Browse more than 200 stone types across every color and pattern, from everyday staples like Amethyst and Jasper to collector favorites such as Red Garnet and rare Turquoise mine-runs. Because the strands measure a full 15 – 16 inches, you get enough beads for matching earring pairs, stretch bracelets, or a necklace focal and still have extras for accents.
Need to drill down fast? Use the filter bar to sort by Stone Type when you know the gem you want, or by Color when you’re building a palette first. Shapes range from classic rounds and rondelles to cubes, heishi, chips, and rare designer cuts—each strand calibrated for even sizing and smooth stringing.
Whether you’re a hobbyist replenishing a bead board or a pro assembling a full production run, this category is the workhorse of our catalog: reliable lengths, vast variety, and new additions arriving every month. Dive in, filter your way to the perfect strand, and keep your design queue flowing with Dakota Stones’ biggest collection.

Amethyst 12mm Round 15-16 Inch

Original price $38.00 - Original price $38.00
Original price $38.00
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Current price $38.00
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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 ...

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Aquamarine Green Yellow Mix Natural 12mm Round - 15-16 Inch - CLEARANCE

Original price $69.00 - Original price $69.00
Original price $69.00
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Current price $69.00
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Aquamarine is a transparent to translucent stone ranging from cerulean blue to light blue in higher grades. In lower grades it can be transparent t...

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Original price $69.00 - Original price $69.00
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Current price $69.00
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Blue Porcelain Agate 12mm Round - 15-16 Inch

Original price $18.00 - Original price $18.00
Original price $18.00
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Current price $18.00
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Porcelain Agate is a natural agate that is dyed and heated to give it the unique blue color and pattern that resembles porcelain. 

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Botswana Agate 12mm Round - 15-16 inch

Original price $40.00 - Original price $40.00
Original price $40.00
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Current price $40.00
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Botswana Agate displays highly defined parallel banding, usually in white on hues of brown, gray, pink, tan, apricot and purplish red. Botswana Aga...

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Crystal Quartz 12mm Round - 15-16 Inch

Original price $37.00 - Original price $37.00
Original price $37.00
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Current price $37.00
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Crystal Quartz is a naturally occurring clear and colorless Quartz. It is a crystalline form of Quartz said to have many divine properties includin...

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Golden Sunstone Natural 12mm Round AA Grade - 15-16 Inch

Original price $105.00 - Original price $105.00
Original price $105.00
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Current price $105.00
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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 $105.00 - Original price $105.00
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Green Lodalite Quartz 12mm Round - 15-16 Inch

Original price $36.00 - Original price $36.00
Original price $36.00
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Current price $36.00
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Green Lodolite is Quartz with inclusions of sand. These inclusions range broadly in type and color and produce patterns that can look like gardens....

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GREEN Terra Agate 12mm Round - 15-16 Inch

Original price $18.00 - Original price $18.00
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Current price $18.00
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With the possible exception of the horizon meeting the bright blue sky on a perfect summer day, or a sandy beach blending into a tropical bay, ther...

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K2 12mm Round - 15-16 Inch

Original price $296.00 - Original price $296.00
Original price $296.00
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Current price $296.00
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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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Labradorite Natural 12mm Round A Grade - 15-16 Inch

Original price $72.00 - Original price $72.00
Original price $72.00
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Current price $72.00
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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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Lava 12mm Round - 15-16 Inch

Original price $14.00 - Original price $14.00
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Lava is rock from the molten center of the earth, once spewed through fractures in the planetary crust or from a volcanic eruption. Once cooled, th...

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MATTE Blue Apatite 12mm A Grade Round - 15-16 Inch

Original price $40.00 - Original price $40.00
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Current price $40.00
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Blue Apatite ranges in color from light teal to blue to bright blue to dark blue to green. It can be easily confused with other minerals due to its...

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Tiger Eye 12mm Round - 15-16 Inch

Original price $24.00 - Original price $24.00
Original price $24.00
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Current price $24.00
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Tiger Eye is a macrocrystalline Quartz stone with bands of rich golds and browns. Its chatoyant layers that create a flash which seems to emanate f...

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Tiger Eye Rainbow 12mm Round - 15-16 Inch

Original price $28.00 - Original price $28.00
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Current price $28.00
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Tiger Eye is a macrocrystalline Quartz stone with bands of rich golds and browns. Its chatoyant layers that create a flash which seems to emanate f...

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Ocean Jasper 12mm Round - 15-16 Inch

Original price $37.00 - Original price $37.00
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Current price $37.00
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Ocean Jasper is a commercial name for Orbicular Jasper, a variety of Jasper containing variably colored spherical patterns. It forms when Quartz an...

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Green Angelite Cat's Eye 12mm Round - 15-16 Inch

Original price $36.00 - Original price $36.00
Original price $36.00
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Current price $36.00
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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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Copper Hematoid Quartz 12mm Star Cut Coin - 15-16 Inch

Original price $36.00 - Original price $36.00
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Current price $36.00
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Hematoid Quartz is Quartz with inclusions of hematite. The hematite inclusions are responsible for the stone’s color, which can be yellow, orange, ...

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Tiger Eye 12mm Star Cut Coin - 15-16 Inch

Original price $24.00 - Original price $24.00
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Tiger Eye is a macrocrystalline Quartz stone with bands of rich golds and browns. Its chatoyant layers that create a flash which seems to emanate f...

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Blue Apatite 12mm Star Cut Coin - 15-16 Inch

Original price $36.00 - Original price $36.00
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Current price $36.00
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Blue Apatite ranges in color from light teal to blue to bright blue to dark blue to green. It can be easily confused with other minerals due to its...

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Carnelian 8x12mm Tube Simple Cut - 15-16 Inch

Original price $20.00 - Original price $20.00
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Carnelian is a glassy, translucent stone that can appear with such bright orange hues that the ancient Egyptians called it “the setting sun.” Most ...

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Labradorite 12x28-15x30mm Faceted Nugget AA Grade - 15-16 Inch

Original price $56.00 - Original price $56.00
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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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Yellow Tiger Eye 12mm Faceted Heart - 15-16 Inch

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Current price $38.00
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Tiger Eye is a macrocrystalline Quartz stone with bands of rich golds and browns. Its chatoyant layers that create a flash which seems to emanate f...

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Rose Quartz 12mm Faceted Heart - 15-16 Inch

Original price $38.00 - Original price $38.00
Original price $38.00
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Rose Quartz is a silicon dioxide crystal and one of the most common varieties of the Quartz family. It is a translucent to transparent stone with a...

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Iolite 12mm Faceted Heart - 15-16 Inch

Original price $43.00 - Original price $43.00
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Current price $43.00
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Iolite most commonly occurs in shades of blue to gray, violet or indigo. It displays a visual property called “pleochroism,” which means that it ca...

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Brazilian Amazonite 12mm Faceted Heart - 15-16 Inch

Original price $38.00 - Original price $38.00
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Current price $38.00
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Brazilian Amazonite is an opaque blue to green to light green stone, often occurring with inclusions of white, yellow or gray and occasionally tran...

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White Lace Red Jasper 12mm Round - 15-16 Inch

Original price $18.00 - Original price $18.00
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Current price $18.00
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White Lace Red Jasper is a deep red or burnt orange stone, complemented by white, gray, and black bands and flecks of color. Red Jasper has histori...

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Sodalite 12mm Round - 15-16 Inch

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Sodalite is named for its sodium content and may be classified as a feldspathoid. Blue Sodalite is sometimes referred to as “poor man’s lapis” beca...

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Polychrome Jasper 12mm Round - 15-16 Inch

Original price $27.00 - Original price $27.00
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Polychrome Jasper is considered one of the rarest Jaspers in the world. First discovered in 2006, it is exclusively sourced from a single small dep...

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Ocean Jasper 12mm Round A Grade - 15-16 Inch

Original price $39.00 - Original price $39.00
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Current price $39.00
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Ocean Jasper is a commercial name for Orbicular Jasper, a variety of Jasper containing variably colored spherical patterns. It forms when Quartz an...

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Mahogany Obsidian 12mm Round - 15-16 Inch

Original price $18.00 - Original price $18.00
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Carnelian 12mm Round - 15-16 Inch

Original price $23.00 - Original price $23.00
Original price $23.00
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Current price $23.00
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Carnelian is a glassy, translucent stone that can appear with such bright orange hues that the ancient Egyptians called it “the setting sun.” Most ...

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Blue and Yellow Tiger Eye 12mm Round - 15-16 Inch

Original price $27.00 - Original price $27.00
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Blue Tiger Eye is a naturally occurring dark stone with chatoyant layers that create a flash which seems to emanate from within the stone as they c...

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Black Silver Leaf Jasper 12mm Round - 15-16 Inch

Original price $32.00 - Original price $32.00
Original price $32.00
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Current price $32.00
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Black Silverleaf Jasper is a rare form of Jasper, characterized by its color range of black, gray and white and its swirling, leafy patterns. It is...

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Pilbara Prase 12mm Round AA Grade - 15-16 Inch

Original price $45.00 - Original price $45.00
Original price $45.00
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Pilbara Prase is a chrome-rich chert gemstone that originates from the Pilbara region of Western Australia. It is also known as Dragon's Blood Ston...

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Jadeite 12mm Round A Grade - 15-16 Inch

Original price $90.00 - Original price $90.00
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Current price $90.00
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Jade refers to an ornamental mineral, mostly known for its green varieties. Jade has been used for tens of thousands of years, initially as tools b...

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Original price $90.00 - Original price $90.00
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Blue Ice Glaciertite 12mm Round A Grade - 15-16 Inch

Original price $99.00 - Original price $99.00
Original price $99.00
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Current price $99.00
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Glacierite, also known as Blue Ice Glacierite or Blue Ice Nakaurite, is a rare, newly discovered mineral from Indonesia that is an accidental bypro...

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Original price $99.00 - Original price $99.00
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Atlantisite Stichtite 12 Round - 15-16 Inch

Original price $65.00 - Original price $65.00
Original price $65.00
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Current price $65.00
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Stichtite is a mineral, a carbonate of chromium and magnesium. Its color ranges from pink through lilac to a rich purple color. Discovered in 1910 ...

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Ancient Cellar Black Agate 12mm Matte Round - 15-16 Inch

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Ancient Cellar Black Agate is a natural agate that is dyed and heated to give it the unique color and pattern we call Ancient Cellar.

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Ancient Cellar Red Agate 12mm Matte Round - 15-16 Inch

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Ancient Cellar Red Agate is a natural agate that is dyed and heated to give it the unique color and pattern we call Ancient Cellar.

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Ancient Cellar Red Agate 12mm Round - 15-16 Inch

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Current price $14.00
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Ancient Cellar Red Agate is a natural agate that is dyed and heated to give it the unique color and pattern we call Ancient Cellar.

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Original price $14.00
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Blue Black Porcelain Agate 12mm Matte Round - 15-16 inch

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Current price $16.00
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Porcelain Agate is a natural agate that is dyed and heated to give it the unique blue/black color and pattern that resembles porcelain.

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Blue Black Porcelain Agate 12mm Round - 15-16 inch

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Porcelain Agate is a natural agate that is dyed and heated to give it the unique blue/black color and pattern that resembles porcelain.

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White Porcelain Agate 12mm Round- 15-16 inch

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Porcelain Agate is a natural agate that is dyed and heated to give it a pattern that resembles porcelain.

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Current price $16.00
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Blue White Porcelain Agate 12mm Matte Round - 15-16 inch

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Porcelain Agate is a natural agate that is dyed and heated to give it the unique blue/white color and pattern that resembles porcelain.

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White Porcelain Agate 12mm Matte Round - 15-16 inch - CLEARANCE

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Porcelain Agate is a natural agate that is dyed and heated to give it a pattern that resembles porcelain.

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Opalite (Synthetic) 12mm Puff Coin - 15-16 inch - CLEARANCE

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Opalite is the trade name for man to made glass treated to exhibit the internal flashes of true Opals in translucent samples, and opalescence or lu...

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Frequently asked questions

  • What is a 16-inch strand and why is it the trade standard?
    A 16-inch strand is the working length most US jewelry designers buy for design-grade work — necklaces, multi-strand layouts, and bulk component sourcing. It gives enough beads to lay out a full 18–20 inch necklace with clasp and findings, or to cut down into shorter assemblies without running short. The 16-inch length has been the trade default for decades because it standardizes pricing and bead-count math across stones and cuts. Dakota's 16-inch hub covers the full catalog at this length, across rounds, rondelles, faceted cuts, cubes, coins, and shape work. The bracelet counterpart is the 8-inch strand.
  • How many beads per 16-inch strand at common sizes?
    Approximate bead counts per 16-inch strand assume snug-strung beads with no spacer drift. At 2mm you get roughly 200 beads, at 3mm about 135, at 4mm about 100, at 6mm about 66, at 8mm about 50, at 10mm about 40, and at 12mm about 33. Faceted cuts, rondelles, and irregular shapes (pebble, nugget, coin) vary — count is driven by the bead's drilled axis, not its widest dimension. Exact count should be disclosed; ask before buying if a piece-count is critical for your design and isn't specified.
  • 16-inch vs 8-inch — which length for which project?
    16-inch is the necklace and design-strand length: enough material for an 18–20 inch finished necklace, multi-strand torsades, long earring drops, or component cutting. 8-inch is the bracelet length: pre-cut to the wrist standard, sized for stretch-cord bracelets and single-wrap pieces. Designers running production bracelet lines typically buy 8-inch to skip the cut-down step; designers doing necklace work, statement pieces, or mixed assemblies buy 16-inch for the bead count and pricing efficiency. Both lengths share the same stones and cuts where stocked — the choice is about finished-piece geometry, not material grade.
  • What stones and cuts does Dakota carry in 16-inch?
    The 16-inch hub spans the full catalog. Most-stocked stones include agate, turquoise, quartz, jasper, tourmaline, moonstone, garnet, labradorite, opal, and amazonite, with deeper coverage across feldspar, chalcedony, and silica varieties. Cut coverage runs from smooth round and faceted round (the largest categories) through rondelle, microfaceted round, pebble and nugget, cube, table-cut cube, faceted cube, and coin. Standard sizes are 4mm, 6mm, 8mm, and 10mm, with 2mm and 3mm in microfaceted work and 12mm in larger statement rounds. Filter by stone, cut, or size to narrow the grid.
  • How does Dakota measure 16-inch strand lengths?
    Strand length is measured end-to-end along the drilled axis, beads strung snug with no gaps. A 16-inch strand can run 15.5 to 16.5 inches depending on bead shape and how the cutter finished the temporary string — irregular shapes (nugget, pebble, raw-faceted) sit at the looser end because the drill points don't always center on the bead's midline. Bead count per strand reflects this variance. Length and approximate count should be disclosed; if you need a tight tolerance for a calibrated production run, ask before buying so the team can pull and measure before shipping.