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 |
4.85ctw Green Peridot, Round, VS
6 mm (calibrated)
$ 43.09
0.95ct Blue Kyanite, Round, SI
6 mm (calibrated)
$ 23.66
1.27ct Pink Malaya Garnet, Round, VS
6 mm (calibrated)
$ 59.15
0.95ct Orange Hessonite Garnet, Round, VS
6 mm (calibrated)
$ 14.51
1.36ct Orange Zircon, Round, VVS-VS
6 mm (calibrated)
$ 29.80
1.22ct Blue Kyanite, Round, VS-SI
6 mm (calibrated)
$ 30.38
0.87ct Blue Kyanite, Round, SI
6 mm (calibrated)
$ 21.66
1.06ct Pink Tourmaline, Round, Transparent
6 mm (calibrated)
$ 17.57
1.26ct White Zircon, Round, VS
6 mm (calibrated)
$ 37.27
0.89ct Pink Tourmaline, Round, Transparent
6 mm (calibrated)
$ 14.75
4.51ctw Green Peridot, Round, VS
6 mm (calibrated)
$ 44.07
4.41ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 72.48
4.71ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 74.41
1.20ct Orange Zircon, Round, VS
6 mm (calibrated)
$ 28.64
3.90ctw Green Peridot, Round, VS
6 mm (calibrated)
$ 31.76
2.72ctw Red Rubies, Round, VS
6 mm (calibrated)
$ 243.82
1.06ct Green Tourmaline, Round, Transparent
6 mm (calibrated)
$ 17.57
0.95ct Green Tourmaline, Round, Transparent
6 mm (calibrated)
$ 16.28
1.08ct Blue Kyanite, Round, VS-SI
6 mm (calibrated)
$ 22.48
0.93ct Pink Tourmaline, Round, Transparent
6 mm (calibrated)
$ 15.42
3.19ctw Multicolor Opal, Round, Transparent
6 mm (calibrated)
$ 74.48
1.03ct Pink Tourmaline, Round, Transparent
6 mm (calibrated)
$ 17.07
1.04ct Green Emerald, Round, Translucent
6 mm (calibrated)
$ 82.87
0.92ct Orange Hessonite Garnet, Round, VS
6 mm (calibrated)
$ 14.05
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 -> 10 
Easy process.
Overall Rating -> 10
Navigating the site was very easy and the photos of the exact gem you would be purchasing was well done.
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
This is the first time I have used this site. I was dissatisfied with the quality of gems and supplies elsewhere and decided to try GemSelect. They are awesome! I was thrilled to see the variety and the great web performance. There was the ability to search for information as well as gems. Things like the clarity rating system and caret weight of the gems. I have always loved making things and I have just started to make jewelry as a business. However I have never made a ring before and have always wanted to. On GemSelect I was able to find good quality gems to use in my creations. I am so glad the website is so easy to use. Thank you GemSelect.
Overall Rating -> 10
Good. I ts very user friendly.
Overall Rating -> 9 
If you have motion picture, then I will be more satisfied with.
