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 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 |
1.42ct Medium Orange Zircon, Round, VVS-VS
6 mm (calibrated)
$ 40.82
4.63ctw Clear White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 88.13
1.36ct Orange Brown Zircon, Round, VVS-VS
6 mm (calibrated)
$ 35.90
0.89ct Medium Orange Tourmaline, Round, Transparent
6 mm (calibrated)
$ 32.04
4.31ctw Dark Orange Zircon, Round, VVS-VS
6 mm (calibrated)
$ 123.85
2.36ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 44.92
1.32ct Medium Orange Zircon, Round, VVS-VS
6 mm (calibrated)
$ 34.85
2.28ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 42.89
1.06ct Medium Red Ruby, Round, VS
6 mm (calibrated)
$ 95.40
2.49ctw Medium Green Sphene, Round, Transparent
6 mm (calibrated)
$ 14.94
2.33ctw Deep Crimson Rubies, Round, VS
6 mm (calibrated)
$ 251.64
2.43ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 76.98
1.24ct White Zircon, Round, VS
6 mm (calibrated)
$ 44.20
0.82ct Light Green Tourmaline, Round, Transparent
6 mm (calibrated)
$ 18.04
1.37ct Light Red Ruby, Round, VS
6 mm (calibrated)
$ 147.96
1.02ct Light Hot Pink Tourmaline, Round, Transparent
6 mm (calibrated)
$ 20.36
0.95ct Medium Light Green Tourmaline, Round, Transparent
6 mm (calibrated)
$ 23.75
1.38ct Medium-Dark Orange Zircon, Round, VVS-VS
6 mm (calibrated)
$ 36.43
1.36ct Wine Red Ruby, Round, VS-SI
6 mm (calibrated)
$ 146.88
1.19ct Dark Blue Kyanite, Round, SI
6 mm (calibrated)
$ 35.70
1.01ct Bright Navy Blue Kyanite, Round, SI
6 mm (calibrated)
$ 30.30
2.66ctw Warm White Zircon, Round, VS
6 mm (calibrated)
$ 86.83
0.95ct Medium Dark-Orange Hessonite Garnet, Round, VS
6 mm (calibrated)
$ 17.48
1.24ct Light Red Ruby, Round, VS
6 mm (calibrated)
$ 111.60
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 
My experience has always been fantastic. Today I saved 6 gems to email a customer looking for a particular color blend to fit into an east west setting, so her options were limited, but we found one she wanted, deleted all the others in the cart and order the gem she selected. It was helpful to be able to put them in the cart so I could save them until she selected the one she wanted without having to research all of them again.
Overall Rating -> 9 
The checkout said the my ccv was invalid. i had to use another card.
Overall Rating -> 10
It was easy and to the point
Overall Rating -> 9
Always a good quality stone. Priced fairly and shipped promptly. Answers emails quickly
Overall Rating -> 10
I have been very happy with my prior purchases and enjoy the website experience.
Overall Rating -> 10
easy site to navigate
