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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.

Black Tourmalinated Quartz 8mm Round 15-16 Inch

Original price $20.00 - Original price $20.00
Original price $20.00
$20.00 - $20.00
Current price $20.00
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Tourmaline naturally occurs in a full color spectrum and is used as both a trade name and as a gemological name for a group of minerals of varying ...

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Black Tourmaline 10mm 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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Black Tourmaline is a black crystalline aluminum borosilicate mineral with occasional light gray inclusions that appear as flecks or veins. Tourmal...

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Current price $24.00
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Black Tourmaline 4x6mm Table Cut Corner Drilled Cube - 15-16 Inch

Original price $30.00 - Original price $30.00
Original price $30.00
$30.00 - $30.00
Current price $30.00
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Black Tourmaline is a black crystalline aluminum borosilicate mineral with occasional light gray inclusions that appear as flecks or veins. Tourmal...

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Original price $30.00 - Original price $30.00
Original price $30.00
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Current price $30.00
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Blue Moonstone Plated Black Dot 10mm Round Faceted - 15-16 Inch - CLEARANCE

Original price $39.00 - Original price $39.00
Original price $39.00
$39.00 - $39.00
Current price $39.00
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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 $39.00 - Original price $39.00
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Current price $39.00
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Dendritic Black Opal 10mm Round - 15-16 Inch

Original price $23.00 - Original price $23.00
Original price $23.00
$23.00 - $23.00
Current price $23.00
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This variety of opal is named "dendritic" for the small inclusions within it that resemble moss or ferns. These inclusions consist of iron, mangane...

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Original price $23.00 - Original price $23.00
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Dendritic Black Opal 6mm Round 15-16 Inch

Original price $14.00 - Original price $14.00
Original price $14.00
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Current price $14.00
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This variety of opal is named "dendritic" for the small inclusions within it that resemble moss or ferns. These inclusions consist of iron, mangane...

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Original price $14.00 - Original price $14.00
Original price $14.00
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Current price $14.00
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Dendritic Black Opal 8mm Round - 15-16 Inch

Original price $17.00 - Original price $17.00
Original price $17.00
$17.00 - $17.00
Current price $17.00
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This variety of opal is named "dendritic" for the small inclusions within it that resemble moss or ferns. These inclusions consist of iron, mangane...

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Original price $17.00 - Original price $17.00
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Current price $17.00
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Diamond 2-4mm Chip Black- 15-16 Inch

Original price $116.00 - Original price $116.00
Original price $116.00
$116.00 - $116.00
Current price $116.00
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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
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Current price $116.00
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Horn 20mm Round - 15-16 Inch - CLEARANCE

Original price $48.00 - Original price $48.00
Original price $48.00
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Current price $48.00
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Recycled Carabao Water Buffalo horn also known as Cara Horn

Original price $48.00 - Original price $48.00
Original price $48.00
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Current price $48.00
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Horn Matte Side 30x20mm Rectangle - 15-16 Inch - CLEARANCE

Original price $48.00 - Original price $48.00
Original price $48.00
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Current price $48.00
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Recycled Carabao Water Buffalo horn also known as Cara Horn

Original price $48.00 - Original price $48.00
Original price $48.00
$48.00 - $48.00
Current price $48.00
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Hubei Turquoise 4mm Matrix Blue/Green/Black Cube Faceted A Grade Banded - 15-16 Inch

Original price $54.00 - Original price $54.00
Original price $54.00
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Current price $54.00
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Hubei Turquoise- From the Hubei province in Northern China. Two of the finest mines in the Hubei province are the Yungai, which means, "a mountain ...

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Original price $54.00 - Original price $54.00
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Current price $54.00
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Hubei Turquoise 4mm Matrix Blue/Green/Black Table Cut Cube Banded - 15-16 Inch

Original price $62.00 - Original price $62.00
Original price $62.00
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Current price $62.00
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Hubei Turquoise- From the Hubei province in Northern China. Two of the finest mines in the Hubei province are the Yungai, which means, "a mountain ...

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Original price $62.00 - Original price $62.00
Original price $62.00
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Current price $62.00
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Indigo Gabbro 10mm Round - 15-16 Inch

Original price $20.00 - Original price $20.00
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Current price $20.00
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Indigo gabbro is a color variant of the igneous mineral, gabbro. Typically, this color forms black, but occasionally gabbro comes in oranges and gr...

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Indigo Gabbro 8mm Round - 15-16 Inch

Original price $19.00 - Original price $19.00
Original price $19.00
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Current price $19.00
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Indigo gabbro is a color variant of the igneous mineral, gabbro. Typically, this color forms black, but occasionally gabbro comes in oranges and gr...

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Original price $19.00 - Original price $19.00
Original price $19.00
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Current price $19.00
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Jet 10mm 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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Original price $24.00 - Original price $24.00
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Jet 4mm Round - 15-16 inch

Original price $16.00 - Original price $16.00
Original price $16.00
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Current price $16.00
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Original price $16.00 - Original price $16.00
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Jet 6mm 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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Current price $18.00
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Jet 8mm Round - 15-16 inch

Original price $20.00 - Original price $20.00
Original price $20.00
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Current price $20.00
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Original price $20.00 - Original price $20.00
Original price $20.00
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Current price $20.00
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Lava 10mm Round - 15-16 Inch

Original price $12.00 - Original price $12.00
Original price $12.00
$12.00 - $12.00
Current price $12.00
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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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Lava 12mm Round - 15-16 Inch

Original price $14.00 - Original price $14.00
Original price $14.00
$14.00 - $14.00
Current 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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Original price $14.00 - Original price $14.00
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Lava 4mm Round - 15-16 Inch

Original price $6.00 - Original price $6.00
Original price $6.00
$6.00 - $6.00
Current price $6.00
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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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Original price $6.00 - Original price $6.00
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Mexican Black & Red Zebra Jasper 10mm Round - 15-16 Inch

Original price $26.00 - Original price $26.00
Original price $26.00
$26.00 - $26.00
Current price $26.00
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Mexican Black and Red Zebra Jasper has banded and marbled patterns of translucent to opaque milky white, black and red. Jasper has a long and illus...

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Onyx 10mm Round Step Cut - 15-16 Inch

Original price $18.00 - Original price $18.00
Original price $18.00
$18.00 - $18.00
Current price $18.00
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Onyx is a black and white banded Chalcedony, a cryptocrystalline Quartz. It is often thought of as an all to black stone, and much of the black Ony...

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Current price $18.00
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Onyx 8mm Star Cut Round 15-16 Inch

Original price $19.00 - Original price $19.00
Original price $19.00
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Current price $19.00
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Onyx is a black and white banded Chalcedony, a cryptocrystalline Quartz. It is often thought of as an all-black stone, and much of the black Onyx o...

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Original price $19.00 - Original price $19.00
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Current price $19.00
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FAQ

Are all Dakota Stones gemstone beads genuine?

Yes, all of our gemstone beads are made from authentic, natural materials. Any treatments (such as stabilization or dyeing) are clearly noted.

Are gemstone beads durable for everyday jewelry?

Most stones are durable, but hardness varies. Softer stones (below 6 on the Mohs scale) are best for necklaces or earrings rather than rings or bracelets.

How are Dakota Stones ethically sourced?

We are an ethical business that focuses on responsibly sourced rather than making absolute claims. There is no universal or enforceable certification system for ethically sourced gemstone rough used in beads.

Our sourcing decisions are guided by:

  • Long-standing relationships with trusted partners
  • Clear expectations for labor and working conditions
  • Ongoing evaluation of suppliers and materials
  • Transparency about what is—and isn’t—documented in the industry
Where are your gemstones manufactured?

Most of our gemstone beads are manufactured in China and India, with select turquoise products sourced and produced in the United States.

Our primary manufacturing partner in China is a long-standing, multigenerational relationship that dates back to 2003. In India, we work primarily with smaller, family-based operations and purchase ready stock rather than commissioning production.

Do you work directly with miners?

When possible, yes. In many cases, however, direct sourcing from miners is not feasible due to cost, logistics, or material availability—especially for lower-value stones like jaspers and agates.

Instead, we often work with trusted intermediaries who have established relationships within the mining and cutting communities. This is common and unavoidable in the natural stone industry.

Why don’t you list mine-by-mine origins for every stone?

That level of documentation often does not exist—or cannot be verified reliably—for gemstone beads.

Natural stones frequently pass through multiple hands between mining, cutting, and stringing. Rather than offering incomplete or misleading origin claims, we choose to be honest about what we know and transparent about industry limitations.

Have labor conditions improved in your supply chain over time?

Yes. Over the past two decades, labor standards, worker protections, and compensation—particularly in China—have improved significantly as policies shifted toward building a middle class and formalizing manufacturing standards.

These changes have increased costs, but they also reflect progress in worker welfare. We view that as a positive development and adjust our sourcing accordingly.