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 |
3.32ctw Lively Yellowish Green Peridot, Round, VS
6 mm (calibrated)
$ 39.08
0.88ct Dark Brown Smoky Quartz, Round, Transparent
6 mm (calibrated)
$ 7.39
4.60ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 87.55
2.23ctw White Zircon, Round, VS
6 mm (calibrated)
$ 42.46
1.15ct Medium Pink Tourmaline, Round, Transparent
6 mm (calibrated)
$ 21.08
0.95ct Light Blue Kyanite, Round, SI
6 mm (calibrated)
$ 28.50
1.46ct Magenta Pink Ruby, Round, VS
6 mm (calibrated)
$ 157.68
0.88ct London Blue Topaz, Round, VS
6 mm (calibrated)
$ 10.98
1.78ct Black Star Diopside, Round, Opaque
6 mm (calibrated)
$ 10.68
1.37ct Jam Red Ruby, Round, VS
6 mm (calibrated)
$ 147.96
1.04ct Deep Orange Sphalerite, Round, SI
6 mm (calibrated)
$ 62.40
1.10ct Multicolor Labradorite, Round, Translucent
6 mm (calibrated)
$ 2.86
1.20ct Deep Orange Zircon, Round, VS
6 mm (calibrated)
$ 34.50
0.98ct Pinkish Red Ruby, Round, VS-SI
6 mm (calibrated)
$ 745.78
0.93ct Light Pink Tourmaline, Round, Transparent
6 mm (calibrated)
$ 22.32
1.23ct Hot Pink Tourmaline, Round, Transparent
6 mm (calibrated)
$ 24.56
2.10ctw White Zircon, Round, VS
6 mm (calibrated)
$ 39.97
0.92ct Reddish Orange Sphalerite, Round, SI-I1
6 mm (calibrated)
$ 55.20
4.38ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 83.38
1.15ct Yellowish Orange Hessonite Garnet, Round, VS
6 mm (calibrated)
$ 23.48
1.24ct White Zircon, Round, VVS
6 mm (calibrated)
$ 39.29
0.85ct Medium Dark Blue Kyanite, Round, SI
6 mm (calibrated)
$ 25.50
1.76ctw Deep Red Pyrope Garnet, Round, VS
6 mm (calibrated)
$ 18.59
1.07ct Brick Red Malaya Garnet, Round, VS
6 mm (calibrated)
$ 56.50
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 
The website has a good selection, the interface is very intuitive.
Overall Rating -> 10
First time so this is an experiment! Shopping is so fun on this site, though!
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
I can pick and choose from large selection and find just what I need for .y projects, currently my cane.
Overall Rating -> 10
selection was broad and the check out was quick. Great site
Overall Rating -> 10
Everything was great, website user friendly, quality amazing, communication amazing, delivery amazing, everything was as expected, they done what they said they would, overall experience was amazing.
