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 |
1.10ct Red Ruby, Round, VS-SI
6 mm (calibrated)
$ 378.98
0.99ct Brown Color-Change Garnet, Round, VS
6 mm (calibrated)
$ 79.09
1.21ct Red Ruby, Round, VS-SI
6 mm (calibrated)
$ 416.88
2.13ctw White Zircon, Round, VS
6 mm (calibrated)
$ 33.65
0.85ct Blue Kyanite, Round, SI
6 mm (calibrated)
$ 21.17
2.08ctw Multicolor Labradorite, Round, Translucent
6 mm (calibrated)
$ 4.47
1.19ct Blue Kyanite, Round, SI
6 mm (calibrated)
$ 29.63
2.25ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 35.52
1.19ct Orange Zircon, Round, VVS-VS
6 mm (calibrated)
$ 26.08
4.72ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 77.57
1.03ct Blue Kyanite, Round, SI
6 mm (calibrated)
$ 25.65
1.28ct Red Ruby, Round, VS-SI
6 mm (calibrated)
$ 440.99
0.89ct Pink Tourmaline, Round, Transparent
6 mm (calibrated)
$ 14.75
1.26ct Orange Zircon, Round, VVS-VS
6 mm (calibrated)
$ 30.06
2.52ctw White Zircon, Round, VVS
6 mm (calibrated)
$ 39.78
2.46ctw White Zircon, Round, VVS
6 mm (calibrated)
$ 64.68
0.54ct White Rainbow Moonstone, Round, Transparent
6 mm (calibrated)
$ 18.82
1.14ct Orange Zircon, Round, VS
6 mm (calibrated)
$ 27.20
2.24ctw Multicolor Labradorite, Round, Translucent
6 mm (calibrated)
$ 4.82
2.43ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 63.89
1.20ct Brown Color-Change Garnet, Round, VVS-VS
6 mm (calibrated)
$ 95.87
2.33ctw White Zircon, Round, VS
6 mm (calibrated)
$ 36.81
1.76ctw Orange Sunstone, Round, Translucent
6 mm (calibrated)
$ 19.28
0.66ct White Rainbow Moonstone, Round, Transparent
6 mm (calibrated)
$ 21.03
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 -> 8 
I visited several online loose stone shops trying to find rare stones. I finally found one that I've been looking for here, and very satisfied. Looking forward to receive the item in 3 weeks.
Overall Rating -> 10 
Great website, easy to navigate, and loads quickly. Have bought here before, very pleased!
Overall Rating -> 10
Absolutely love Gem Select. I always know the quality and accuracy of information and photos are top notch. Highly recommend!
Overall Rating -> 10
I loved it! Extensive inventory, great prices, I definitely will be buying from here again!
Overall Rating -> 10
I am filling a small treasure chest and picked a nice amethyst.
Overall Rating -> 8
Site worked well and helped me find a rock that matched what I was looking for. Well within budget and I trust it will show up, so that's definitely positive. Not much else to it. Satisfied.
