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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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 |
4.36ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 86.33
4.86ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 96.23
0.95ct Pink Tourmaline, Round, Transparent
6 mm (calibrated)
$ 18.97
1.09ct Purple Tourmaline, Round, Transparent
6 mm (calibrated)
$ 23.98
0.96ct Orange Hessonite Garnet, Round, VS
6 mm (calibrated)
$ 17.68
4.65ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 92.08
1.06ct Orange Hessonite Garnet, Round, VS
6 mm (calibrated)
$ 22.30
1.18ct Green Tourmaline, Round, Transparent
6 mm (calibrated)
$ 23.57
1.23ct Pink Tourmaline, Round, Transparent
6 mm (calibrated)
$ 24.56
4.43ctw White Zircon, Round, VVS
6 mm (calibrated)
$ 84.61
1.11ct Orange Sphalerite, Round, SI
6 mm (calibrated)
$ 66.60
2.32ctw Orange Zircon, Round, VVS-VS
6 mm (calibrated)
$ 66.67
1.31ct Orange Zircon, Round, VVS-VS
6 mm (calibrated)
$ 34.58
4.18ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 79.84
1.11ct Brown Color-Change Garnet, Round, VS
6 mm (calibrated)
$ 106.84
1.17ct Green Tourmaline, Round, Transparent
6 mm (calibrated)
$ 23.36
1.77ctw Multicolor Opal, Round, Transparent
6 mm (calibrated)
$ 49.79
0.98ct Orange Hessonite Garnet, Round, VVS-VS
6 mm (calibrated)
$ 18.04
1.24ct Red Ruby, Round, VS
6 mm (calibrated)
$ 111.60
1.00ct Pink Tourmaline, Round, Transparent
6 mm (calibrated)
$ 19.97
1.27ct Pink Malaya Garnet, Round, VS
6 mm (calibrated)
$ 71.26
0.82ct Green Tourmaline, Round, Transparent
6 mm (calibrated)
$ 18.04
0.84ct Violet Amethyst, Round, Transparent
6 mm (calibrated)
$ 7.06
1.10ct Blue Kyanite, Round, SI
6 mm (calibrated)
$ 33.00
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 
The purchasing process is fairly quick and straightforward and for me user friendly so it probably took more or less than 3 minutes to purchase and pay for the items. I wish there was a discount offer for multiple items to encourage us buyers to purchase more an incentive and add more sales in your end. Besides that, it's been a great purchasing experience and will continue to shop as I am a repeat customer and have bought from your store many times before. Thank you.
Overall Rating -> 10 
It was all good
Overall Rating -> 10
Good. I ts very user friendly.
Overall Rating -> 10
selection was broad and the check out was quick. Great site
Overall Rating -> 9
Very good and simple exchange
Overall Rating -> 10
Found a beautiful opal at a great price. I was not disappointed when it arrived. Even better in person.
