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 |
2.15ctw White Zircon, Round, VS
6 mm (calibrated)
$ 40.92
2.49ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 71.71
1.08ct Medium Orange Sphalerite, Round, VS-SI
6 mm (calibrated)
$ 64.80
4.31ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 92.16
4.12ctw Clear White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 78.42
0.99ct Pecan Brown Color-Change Garnet, Round, VS
6 mm (calibrated)
$ 95.29
0.97ct Pistachio Green Emerald, Round, Translucent
6 mm (calibrated)
$ 93.12
0.97ct Medium Orange Hessonite Garnet, Round, VS
6 mm (calibrated)
$ 18.54
1.08ct White Cat's Eye Moonstone, Round, Transparent
6 mm (calibrated)
$ 5.56
3.90ctw Light Lively Green Peridot, Round, VVS-VS
6 mm (calibrated)
$ 45.92
0.89ct Yellowish Green Tourmaline, Round, Transparent
6 mm (calibrated)
$ 17.77
2.36ctw Medium-Dark Orange Hessonite Garnet, Round, VS-SI
6 mm (calibrated)
$ 46.07
2.32ctw Medium-Dark Orange Zircon, Round, VVS-VS
6 mm (calibrated)
$ 66.67
1.05ct Light Green Emerald, Round, Translucent
6 mm (calibrated)
$ 100.80
2.39ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 75.72
1.39ct Deep Crimson Ruby, Round, VS
6 mm (calibrated)
$ 150.12
2.12ctw White Zircon, Round, VS
6 mm (calibrated)
$ 40.36
1.00ct Earth Orange Sphalerite, Round, SI-I1
6 mm (calibrated)
$ 60.00
1.37ct Deep Crimson Ruby, Round, VS
6 mm (calibrated)
$ 147.96
1.06ct Medium-Dark Orange Hessonite Garnet, Round, VS
6 mm (calibrated)
$ 22.30
0.93ct Rosewood Pink Tourmaline, Round, Transparent
6 mm (calibrated)
$ 18.58
2.52ctw White Zircon, Round, VVS
6 mm (calibrated)
$ 47.93
4.64ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 88.62
1.20ct Earthy Orange Zircon, Round, VS
6 mm (calibrated)
$ 34.50
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 -> 8 
Good prices
Overall Rating -> 10 
Had a great experience and the prices are great
Overall Rating -> 9 
Plan on purchasing on an ongoing basis. So far.....so good....
Overall Rating -> 10
Very surprised how quick and efficient it was to checkout and pay. Also found exactly what I was looking for no issues.
Overall Rating -> 10
I am never let down by GemSelect. I love that you get the exact stone you want. Shipping is always in a few days. I have spread the word about GemSelect on social media jewelry creating groups that I attend. This sapphire is going to make one gorgeous ring
Overall Rating -> 10
I love the ability to choose from many options of shapes, gemstone type, color, and so forth. It is fun!
