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
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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 |
2.10ctw Multicolor Labradorite, Round, Translucent
6 mm (calibrated)
$ 5.10
2.16ctw Orange Hessonite Garnet, Round, VS
6 mm (calibrated)
$ 33.28
2.47ctw White Zircon, Round, VS
6 mm (calibrated)
$ 39.03
1.59ctw Orange Sunstone, Round, Transparent
6 mm (calibrated)
$ 17.42
1.28ct Red Ruby, Round, VS-SI
6 mm (calibrated)
$ 440.99
1.01ct Blue Kyanite, Round, SI
6 mm (calibrated)
$ 25.15
4.57ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 75.11
1.08ct Red Ruby, Round, VS-SI
6 mm (calibrated)
$ 96.81
4.85ctw Green Peridot, Round, VS
6 mm (calibrated)
$ 43.09
0.54ct White Rainbow Moonstone, Round, Transparent
6 mm (calibrated)
$ 18.82
1.37ct Red Ruby, Round, VS
6 mm (calibrated)
$ 122.81
1.13ct Orange Zircon, Round, VS
6 mm (calibrated)
$ 26.96
1.04ct Orange Sphalerite, Round, SI
6 mm (calibrated)
$ 51.79
2.46ctw White Zircon, Round, VVS
6 mm (calibrated)
$ 64.68
4.36ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 71.65
4.23ctw White Zircon, Round, VVS
6 mm (calibrated)
$ 67.06
1.18ct Blue Kyanite, Round, SI
6 mm (calibrated)
$ 29.38
0.85ct Blue Kyanite, Round, SI
6 mm (calibrated)
$ 21.17
2.44ctw White Zircon, Round, VVS
6 mm (calibrated)
$ 72.18
2.12ctw White Zircon, Round, VS
6 mm (calibrated)
$ 33.50
2.08ctw Multicolor Labradorite, Round, Translucent
6 mm (calibrated)
$ 4.47
1.37ct Orange Hessonite Garnet, Round, VS-SI
6 mm (calibrated)
$ 19.21
4.61ctw Orange Zircon, Round, VVS-VS
6 mm (calibrated)
$ 110.01
4.64ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 73.55
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
- View All GemSelect Reviews on Bizrate
- 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 -> 7 
Could not get it to work 25 times.
Overall Rating -> 10 
Absolutely love the website, selection and products. Can you guys add a gemstones with inclusions tab. I like those it'd be nice to have them all in one place but i do understand it would be alot of work to go through and categorize them. Thank you anyways
Overall Rating -> 10
Over pretty well experience the your website no complaints about it very easy reliable service provided
Overall Rating -> 10
good navigation and simple interface.
Overall Rating -> 10
Although the stones are smaller than I thought, I really don't think in millimeters, they are perfect. I plan to put one into a ring and the other into a necklace. Ordering was easy, contact kept me aware of how shipping was going, and delivery was sooner than expected. The quality of stones I have ordered in the past and this recent order is outstanding and stones I will be proud to wear.
Overall Rating -> 10
Easy and good price
