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 |
4.62ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 72.99
1.26ct Red Ruby, Round, VS
6 mm (calibrated)
$ 94.12
0.92ct Pink Malaya Garnet, Round, VS-SI
6 mm (calibrated)
$ 30.24
2.18ctw Pink Tourmaline, Round, Transparent
6 mm (calibrated)
$ 36.14
1.18ct Pink Ruby, Round, VS-SI
6 mm (calibrated)
$ 105.78
2.32ctw Pink Tourmaline, Round, Transparent
6 mm (calibrated)
$ 38.45
4.77ctw Green Peridot, Round, VS
6 mm (calibrated)
$ 46.62
0.96ct Orange Hessonite Garnet, Round, VS
6 mm (calibrated)
$ 16.28
2.72ctw Red Rubies, Round, VS
6 mm (calibrated)
$ 243.82
1.04ct Green Emerald, Round, Translucent
6 mm (calibrated)
$ 72.51
0.94ct Yellow Tourmaline, Round, Transparent
6 mm (calibrated)
$ 28.09
2.52ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 39.78
2.46ctw White Zircon, Round, VVS
6 mm (calibrated)
$ 64.68
0.70ct Green Emerald, Round, Translucent
6 mm (calibrated)
$ 55.78
0.99ct Brown Color-Change Garnet, Round, VS
6 mm (calibrated)
$ 79.09
0.96ct Orange Hessonite Garnet, Round, VS
6 mm (calibrated)
$ 14.67
2.43ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 63.89
4.86ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 79.87
2.36ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 37.28
4.75ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 75.05
1.36ct Red Ruby, Round, VS-SI
6 mm (calibrated)
$ 121.91
1.28ct Red Ruby, Round, VS-SI
6 mm (calibrated)
$ 440.99
1.20ct Brown Color-Change Garnet, Round, VVS-VS
6 mm (calibrated)
$ 95.87
2.12ctw White Zircon, Round, VS
6 mm (calibrated)
$ 33.50
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 -> 9 
It was fine . Wish there had been more round stones to select from
Overall Rating -> 10
I purchased 4 gemstones in different sizes to be able to make a family ring for my granddaughter. I got exactly what I saw and they are absolutely beautiful! Shipping was quick compared to other gem stores I have dealt with! I will definitely order more stones from your company, as I am a collector and have several stones. You are my new go to company in the future
Overall Rating -> 10
I was looking for high-quality amethyst on this site, and I was able to compare size, color, and weight in detail before making a purchase.
Overall Rating -> 8 
It was fine
Overall Rating -> 10
I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.
