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 |
4.72ctw Clear White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 93.46
1.26ct White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 44.90
4.36ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 86.33
0.95ct Medium Green Tourmaline, Round, Transparent
6 mm (calibrated)
$ 19.62
1.19ct Deep Reddish Orange Zircon, Round, VVS-VS
6 mm (calibrated)
$ 31.42
0.92ct Reddish Orange Hessonite Garnet, Round, VS
6 mm (calibrated)
$ 16.93
1.12ct Deep Orange Sphalerite, Round, SI-I1
6 mm (calibrated)
$ 67.20
1.18ct True Blue Kyanite, Round, SI
6 mm (calibrated)
$ 35.40
4.75ctw Medium-Dark Orange Zircon, Round, VVS-VS
6 mm (calibrated)
$ 136.57
1.40ct Reddish Pink Ruby, Round, VS-SI
6 mm (calibrated)
$ 151.20
2.51ctw White Zircon, Round, VVS
6 mm (calibrated)
$ 89.46
4.49ctw Clear White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 85.76
1.05ct Earth Orange Hessonite Garnet, Round, VS
6 mm (calibrated)
$ 21.43
2.27ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 42.71
2.31ctw Multicolor Labradorite, Round, Translucent
6 mm (calibrated)
$ 5.99
4.23ctw White Zircon, Round, VVS
6 mm (calibrated)
$ 80.80
2.25ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 42.79
0.84ct Bluish White Rainbow Moonstone, Round, Transparent
6 mm (calibrated)
$ 32.26
3.09ctw Deep Blue Star Sapphire, Round, Opaque
6 mm (calibrated)
$ 77.50
1.95ctw Multicolor Opal, Round, Translucent
6 mm (calibrated)
$ 90.10
4.34ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 82.90
0.85ct Deep Blue Kyanite, Round, SI
6 mm (calibrated)
$ 25.50
4.54ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 89.89
1.90ctw Bubblegum Pink Tourmaline, Round, Transparent
6 mm (calibrated)
$ 37.94
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 -> 9 
I love the gems!
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
They have a wonderful selection of gems of all sorts, shapes, cuts, and quality. I am very particular about the quality of stones I buy, and found many with VVS clarity and excellent cut and polish. I am thrilled with each of the stones I purchased, and would definitely recommend GemSelect to everyone.
Overall Rating -> 10
I feel Gemselect is a trustworthy company to buy from
Overall Rating -> 10
love the site, the experience and the products.
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.
