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 |
2.38ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 37.60
2.18ctw Pink Tourmaline, Round, Transparent
6 mm (calibrated)
$ 36.14
2.27ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 35.45
1.27ct Blue Kyanite, Round, SI
6 mm (calibrated)
$ 31.62
4.56ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 72.05
1.12ct Pink Tourmaline, Round, Transparent
6 mm (calibrated)
$ 18.57
2.38ctw White Zircon, Round, VVS
6 mm (calibrated)
$ 62.58
0.95ct Blue Kyanite, Round, SI
6 mm (calibrated)
$ 23.66
1.09ct Purple Tourmaline, Round, Transparent
6 mm (calibrated)
$ 19.90
1.21ct Red Ruby, Round, VS-SI
6 mm (calibrated)
$ 108.46
1.26ct Red Ruby, Round, VS
6 mm (calibrated)
$ 94.12
0.94ct Yellow Tourmaline, Round, Transparent
6 mm (calibrated)
$ 28.09
2.12ctw Multicolor Labradorite, Round, Translucent
6 mm (calibrated)
$ 5.15
2.56ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 67.31
1.37ct Orange Hessonite Garnet, Round, VS-SI
6 mm (calibrated)
$ 19.21
1.29ct Pink Tourmaline, Round, Transparent
6 mm (calibrated)
$ 21.38
1.37ct Red Ruby, Round, VS
6 mm (calibrated)
$ 122.81
4.64ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 73.55
4.41ctw White Zircon, Round, VS
6 mm (calibrated)
$ 69.67
1.27ct Green Emerald, Round, Translucent
6 mm (calibrated)
$ 88.54
2.10ctw White Zircon, Round, VS
6 mm (calibrated)
$ 33.18
0.97ct Pink Tourmaline, Round, Transparent
6 mm (calibrated)
$ 16.62
1.59ctw Orange Sunstone, Round, Transparent
6 mm (calibrated)
$ 17.42
0.53ct Multicolor Opal, Round, Opaque
6 mm (calibrated)
$ 17.42
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 
easy interface for a pricless buy
Overall Rating -> 10 
GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'
Overall Rating -> 9 
Will know more once order received
Overall Rating -> 10
Found a beautiful opal at a great price. I was not disappointed when it arrived. Even better in person.
Overall Rating -> 10
Easy to use website
Overall Rating -> 10
I feel Gemselect is a trustworthy company to buy from
