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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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 |
2.38ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 45.30
4.57ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 90.49
1.28ct Red Ruby, Round, VS-SI
6 mm (calibrated)
$ 531.31
2.39ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 85.18
4.73ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 90.34
4.74ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 90.54
4.24ctw Orange Zircon, Round, VVS-VS
6 mm (calibrated)
$ 121.84
2.32ctw Pink Tourmaline, Round, Transparent
6 mm (calibrated)
$ 46.32
0.96ct Orange Hessonite Garnet, Round, VVS-VS
6 mm (calibrated)
$ 14.40
0.97ct Orange Hessonite Garnet, Round, VS
6 mm (calibrated)
$ 18.54
1.38ct Orange Zircon, Round, VVS-VS
6 mm (calibrated)
$ 36.43
1.42ct Orange Zircon, Round, VVS-VS
6 mm (calibrated)
$ 40.82
1.14ct Orange Zircon, Round, VS
6 mm (calibrated)
$ 32.77
1.20ct Red Ruby, Round, VS
6 mm (calibrated)
$ 129.60
0.91ct Pink Tourmaline, Round, Transparent
6 mm (calibrated)
$ 43.68
0.84ct Green Tourmaline, Round, Transparent
6 mm (calibrated)
$ 16.78
1.08ct Blue Kyanite, Round, VS-SI
6 mm (calibrated)
$ 27.08
2.18ctw Pink Tourmaline, Round, Transparent
6 mm (calibrated)
$ 43.54
1.78ct Black Star Diopside, Round, Opaque
6 mm (calibrated)
$ 10.68
0.92ct Orange Sphalerite, Round, SI-I1
6 mm (calibrated)
$ 55.20
2.36ctw Orange Hessonite Garnet, Round, VS-SI
6 mm (calibrated)
$ 46.07
1.04ct Orange Sphalerite, Round, SI
6 mm (calibrated)
$ 62.40
1.15ct Orange Hessonite Garnet, Round, VS
6 mm (calibrated)
$ 23.48
1.22ct Yellow Sphalerite, Round, SI-I1
6 mm (calibrated)
$ 73.20
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 
GemSelect is always my first choice for purchasing gemstones. The fact that the gems are always exactly as described and pictured on the website has earned my trust many times over. Even when I don't buy, I still love browsing all the beautiful stones. My new favorites are the bright green Tsavorites!
Overall Rating -> 10
It was good. There was a large selection at prices I could afford.
Overall Rating -> 10
They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.
Overall Rating -> 9 
the gems were smaller than I thought but I was at fault for not reading the complete discrimination
Overall Rating -> 10
On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc
Overall Rating -> 10
Excellent options
