6 mm Round Gemstones
Browse our collection of calibrated 6 mm round gemstones, perfect for standard jewelry settings and custom designs.
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Bi-color
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Black 6 mm Round Gems
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Blue 6 mm Round Gems
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Brown 6 mm Round Gems
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Golden 6 mm Round Gems
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Gray 6 mm Round Gems
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Green 6 mm Round Gems
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Multicolor 6 mm Round Gems
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Orange 6 mm Round Gems
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Pink 6 mm Round Gems
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Purple 6 mm Round Gems
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Red 6 mm Round Gems
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Turquoise
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Violet 6 mm Round Gems
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White 6 mm Round Gems
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Yellow 6 mm Round Gems
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Single |
Pairs |
Lots |
Faceted |
Cabochons |
1.11ct Medium-Dark Orange Hessonite Garnet, Round, SI-I1
6 mm (calibrated)
$ 18.77
0.64ct Multicolor Chocolate Opal, Round, Translucent
6 mm (calibrated)
$ 21.12
1.19ct Raspberry Pink Malaya Garnet, Round, VS
6 mm (calibrated)
$ 66.77
1.32ct Deep Blue Kyanite, Round, SI
6 mm (calibrated)
$ 39.60
0.92ct Warm Brown Tiger's Eye, Round, Opaque
6 mm (calibrated)
$ 1.09
1.03ct Reddish Orange Hessonite Garnet, Round, VS
6 mm (calibrated)
$ 21.02
2.17ctw Silverish Blue Tanzanite, Round, Transparent
6 mm (calibrated)
$ 35.81
2.47ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 88.03
1.06ct Yellowish Orange Hessonite Garnet, Round, VS
6 mm (calibrated)
$ 22.30
1.06ct Light Pink Tourmaline, Round, Transparent
6 mm (calibrated)
$ 21.17
2.11ctw Multicolor Opal, Round, Transparent
6 mm (calibrated)
$ 59.35
3.90ctw Medium Green Peridot, Round, VS
6 mm (calibrated)
$ 38.27
0.54ct Bluish White Rainbow Moonstone, Round, Transparent
6 mm (calibrated)
$ 22.68
2.27ctw White Zircon, Round, VVS
6 mm (calibrated)
$ 80.90
2.18ctw Light Pink Tourmaline, Round, Transparent
6 mm (calibrated)
$ 43.54
0.97ct Deep Gold Sphalerite, Round, SI-I1
6 mm (calibrated)
$ 58.20
0.92ct Indian Red Tourmaline, Round, Transparent
6 mm (calibrated)
$ 23.00
2.52ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 79.84
2.20ctw Silverish Blue Tanzanite, Round, Translucent
6 mm (calibrated)
$ 43.56
0.94ct Deep Golden Orange Tourmaline, Round, Transparent
6 mm (calibrated)
$ 33.84
1.10ct Yellowish Golden Sphalerite, Round, SI
6 mm (calibrated)
$ 66.00
1.00ct Medium Pink Tourmaline, Round, Transparent
6 mm (calibrated)
$ 19.97
1.22ct Warm Apricot Orange Moonstone, Round, Translucent
6 mm (calibrated)
$ 2.94
2.30ctw White Zircon, Round, VS
6 mm (calibrated)
$ 81.97
Why Buy 6 Mm Round Gems from GemSelect?
- Trusted Worldwide Since 2003
- Supplying natural gemstones to jewelers and collectors in 120+ countries
- Verified natural gemstones
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- Secure checkout and insured worldwide delivery
- 30-day returns and satisfaction guarantee
Natural 6 mm Round Gemstones
Our natural 6 mm round gemstones are carefully selected for quality, brilliance, and accurate calibration. These gems are ideal for jewelers and designers who need stones that fit standard jewelry settings with precision.
Shop 6 mm Round Gemstones Online
Buy 6 mm round gemstones online at GemSelect with confidence. Our inventory includes a wide range of natural stones such as sapphire, ruby, garnet, amethyst, citrine and more, all available as loose gemstones ready for jewelry making.
Perfect Size for Standard Jewelry Settings
The 6 mm round gemstone size is one of the most popular calibrated sizes used in jewelry. It fits many standard ring, earring, and pendant mountings, making it an excellent choice for custom jewelry designs.
Wide Variety of Gemstone Types
Our selection of 6 mm round gemstones includes many popular gem types such as sapphire, ruby, topaz, garnet, peridot, and quartz varieties. This allows designers and collectors to find the ideal gemstone for any style or budget.
Faceted and Cabochon Options
Choose from sparkling faceted stones for maximum brilliance or smooth cabochon cuts for a softer appearance. Both cutting styles are available in the classic 6 mm round gemstone size.
Calibrated Gemstones for Jewelers
Calibrated gemstones are cut to precise measurements, making them easy to set into pre-made jewelry mountings. Our 6 mm round gemstones are ideal for jewelers who need consistency and accuracy in their designs.
Loose Gemstones for Custom Jewelry
Loose 6 mm round gemstones are perfect for creating custom jewelry pieces. Whether designing an engagement ring, earrings, or a pendant, these versatile stones offer balance, brilliance, and timeless appeal.
Wholesale 6 mm Round Gemstones
GemSelect offers competitive pricing on loose gemstones, including calibrated 6 mm round stones. Jewelers and collectors can find quality gems suitable for both small projects and larger jewelry production.
Learn more about gemstones, cuts, and jewelry design on our Gemstone Information pages.
FAQs
What does 6 mm mean in gemstones?
The measurement refers to the diameter of the gemstone. A 6 mm round gemstone is approximately 6 millimeters across, making it a common calibrated size used in jewelry settings.
Are 6 mm round gemstones good for rings?
Yes, 6 mm round gemstones are very popular for rings. They provide a balanced size that offers good visual presence without being too large for everyday wear.
Which gemstones are available in 6 mm round size?
Many gemstones are available in this calibrated size, including sapphire, ruby, garnet, amethyst, citrine, topaz, peridot, and other popular varieties.
Are 6 mm gemstones calibrated?
Yes, many 6 mm gemstones are cut to calibrated measurements so they can fit standard jewelry mountings designed for this size.
Can I buy 6 mm round gemstones for custom jewelry?
Absolutely. Loose 6 mm round gemstones are ideal for custom jewelry projects, allowing designers to choose the exact gemstone type, color, and quality they prefer.
GemSelect Certified Store Reviews
GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!
Overall Rating -> 10 
Love how easy the site is to use. Really love that the pictures are of actual product.
Overall Rating -> 10
It's mostly good, only some item's are easier to find through the search than the menu
Overall Rating -> 10
Good selection, using for custom jewlery for my wife.
Overall Rating -> 10
I can pick and choose from large selection and find just what I need for .y projects, currently my cane.
Overall Rating -> 10
I was looking for a site with every type of gem I could want for setting in luxury blades and assumed I would need to look outside the US, but GemSelect made it easy to get everything I wanted without leaving the house! Wide enough selection that I do not feel the need to look elsewhere and pricing the same.
Overall Rating -> 10
It was easy and to the point
