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 |
4.54ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 74.61
1.13ct Orange Zircon, Round, VS
6 mm (calibrated)
$ 26.96
0.88ct Yellow Tourmaline, Round, Transparent
6 mm (calibrated)
$ 17.53
1.32ct Red Ruby, Round, VS
6 mm (calibrated)
$ 118.32
4.55ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 72.13
1.06ct Red Ruby, Round, VS
6 mm (calibrated)
$ 79.18
1.02ct Green Tourmaline, Round, Transparent
6 mm (calibrated)
$ 16.90
0.84ct Green Tourmaline, Round, Transparent
6 mm (calibrated)
$ 13.93
1.78ct Black Star Diopside, Round, Opaque
6 mm (calibrated)
$ 8.86
2.41ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 63.36
1.24ct Orange Zircon, Round, VVS-VS
6 mm (calibrated)
$ 29.59
4.44ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 72.97
1.38ct Orange Zircon, Round, VVS-VS
6 mm (calibrated)
$ 30.24
0.88ct Pink Tourmaline, Round, Transparent
6 mm (calibrated)
$ 14.58
1.79ctw Blue Tanzanite, Round, Transparent
6 mm (calibrated)
$ 29.42
1.45ct Red Ruby, Round, VS-SI
6 mm (calibrated)
$ 129.98
1.24ct Green Tourmaline, Round, Transparent
6 mm (calibrated)
$ 20.55
1.30ct Orange Zircon, Round, VVS-VS
6 mm (calibrated)
$ 28.49
1.42ct Orange Zircon, Round, VVS-VS
6 mm (calibrated)
$ 33.88
1.95ctw Multicolor Opal, Round, Translucent
6 mm (calibrated)
$ 74.78
4.63ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 73.15
1.34ct Multicolor Labradorite, Round, Translucent
6 mm (calibrated)
$ 2.88
2.39ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 70.70
3.78ctw Orange Hessonite Garnet, Round, VS-SI
6 mm (calibrated)
$ 53.00
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 
All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.
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
No problems. I had a minor address issue in the past and someone got back to me very quickly and we resolved the issue satisfactorily. I appreciated the quick, concerned response. So important when buyer/seller are so far apart in distance. Thank you Gem Select. Keep up the good work!
Overall Rating -> 10
Excellent options
Overall Rating -> 10
I was able to find what I wanted very easily!
Overall Rating -> 10
Was a good experience.
