Buy 10 mm Round Calibrated Gemstones from GemSelect

Some people by gems by color or price, but for many, it is best to buy gems by shape and size - especially if you're in need of a gem to replace a previous item that was lost or damaged. Calibrated Round shapes, facet cut and cabochon gems available now in 10 mm diameter size range. Shop a wide range of calibrated gemstones by size online at wholesale from GemSelect.

As a general guideline, when it comes to 'calibrated' gems, they are not usually expected to be cut to exact measurements. For calibrated gemstones weighing under one carat, most jewelry settings will accommodate a gem which is within 0.2 mm of the calibrated size in order to fit a standard setting. For gemstones that weigh over one carat, a larger variance is acceptable, often around 0.3 mm or slightly higher even. This small variance can usually be accommodated for standard style settings. Round-cut gemstones should also have a greater variance in acceptable size when it comes to calibration; in fact it is usually possible to mount a round stone of any size in the closest standard setting.

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Overall Rating -> 10

I searched for the item by description and millimeter and had my choice come up and then made the best selection.

Posted By Tim in April, 2024

Source: Bizrate

Overall Rating -> 10

Very pleased with shopping on this site. It's easy to navigate and information about gemstones is very good.

Posted By Kate in December, 2023

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Overall Rating -> 10

I really enjoy browsing through GemSelect. The selection is always marvelous and I love how detailed everything is described. The only thing I noticed is that when browsing through my phone, the videos of the gems do not load. If there were more videos of the gems, that would be amazing, though I understand that is a lot of work on GemSelect's part! Checking out is also very fast and easy, and I love that the return policy is very good, though I hope I don't have to use it anytime soon.

Posted By ChiChi in January, 2024

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Overall Rating -> 10

I have had and will always have a great time shopping at GemSelect. It's a great web site with great products and great service.

Posted By Apps in November, 2023

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Overall Rating -> 10

The gem stone always has a great selection of beautiful stones. The calibrated stone fit my ring perfectly. Thank you gem select !

Posted By Jen in August, 2023

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Overall Rating -> 8

Found on a search engine. Scanned inventory and made a small purchase.

Posted By Ralli in August, 2023

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Overall Rating -> 10

Great selection

Posted By GHS40 in December, 2023

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Overall Rating -> 10

The website is user friendly, has excellent selection. I've always found what I was looking for with Gem Select. When others don't have it they do. And most important, they have a way for you to pay without using PayPal. I cannot use PayPal they closed my account because of no cell phone.

Posted By NJD in September, 2023

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Overall Rating -> 10

Great website and information

Posted By Moonshot in December, 2023

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Overall Rating -> 10

This is only the second time I have ordered from GemSelect. I am a prolific gemstone collector and I wish I had found this site sooner!

Posted By Beachcomber in September, 2023

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Overall Rating -> 9

making my own jewelry for my birth stone

Posted By LoveGeo in July, 2023

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Overall Rating -> 10

No issues at all. It was great.

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Overall Rating -> 9

Never bought anything on this website before, but it probably won't be my last purchase. Definitely one of the easiest to use and most informative sites I've ever been to.

Posted By Bob in November, 2023

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Overall Rating -> 10

Purchased for my granddaughter she was very pleased with it.

Posted By Charlie in April, 2024

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Overall Rating -> 10

I loved the opportunity to shop on a website that I could trust 👍

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Gemstones A-Z

Buy Round Shape 10 mm Gems

5.06 carat Pink Topaz, Round loose Topaz from Brazil, Natural Gem, 10.1 mm

2.02 carat Orange Hessonite Garnet, Cushion loose Hessonite Garnet from Sri Lanka, Natural Untreated Gem, 7.1 x 7 mm

15.55 carat Ammolite, loose Certified Ammolite from Canada, Natural Gem, 22.6 x 16.9 mm

3.17 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 11 x 9.1 mm

6.41 carat Swiss Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gems, 14.2 x 7.1 mm

11.76 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 18.1 x 12.9 mm

21.9 ct Marquise Rose Quartz, 29.8 x 13.8 mm From South Africa

1.68 ct Yellow Quartz, 12.2 x 11.9 mm Carved From Brazil

20.33 ct Oval Larimar, 30.1 x 20.2 mm From the Dominican Republic

0.62 ct Loose Yellow Sapphire, 4.5 x 4.5 mm Cushion Cut From Tanzania

2.29 ct Oval Cut Fire Opal, 11.6 x 8.2 mm From Mexico

3.09 carat Swiss Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 6.8 x 4.8 mm

11.48 carat Pear Jasper, loose Certified Jasper from Indonesia, Natural Untreated Gems, 16.9 x 11.6 mm

14.65 carat Swiss Blue Topaz, Cushion loose Topaz from Brazil, Natural Gem, 16.5 x 9.3 mm

1.49 carat Green Tourmaline, Oval loose Tourmaline from Mozambique, Natural Untreated Gem, 8.3 x 6.1 mm

0.84 carat Teal Sapphire, Cushion loose Sapphire from Madagascar, Natural Gem, 5.7 x 4.6 mm

1.39 carat Blue Tanzanite, Pear Shape loose Tanzanite from Tanzania, Natural Gems, 5.1 x 3.8 mm

1.37 carat Green Tourmaline, Oval loose Tourmaline from Mozambique, Natural Untreated Gem, 8.1 x 6 mm

8.1 ct Oval Quartz Cat's Eye, 12.5 x 10 mm From Sri Lanka

3.36 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gem, 9 x 6.2 mm

0.78 ct Round Cut Color-Change Diaspore, 5.7 mm From Turkey

7.16 ct Carved Prehnite, 15.3 x 9.8 mm From South Africa

2.77 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 10.2 x 7.9 mm

7.41 ct Baguette Labradorite, 11.9 x 10.1 mm From Madagascar

1.03 ct Oval Sillimanite Cat's Eye, 7.3 x 4.7 mm From Madagascar

2.1 ct Round Cut Strawberry Quartz, 8.2 mm From Russia

9.13 ct Green Amazonite, 8.2 mm Round Cut From Madagascar

3.94 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 6 x 4.1 mm

1.15 carat Pear Shape Ruby, loose Certified Ruby from Myanmar, Natural Gem, 6.7 x 6.1 mm

1.58 carat Blue Tanzanite, Oval loose Tanzanite from Tanzania, Natural Gem, 8.2 x 6.3 mm

1 ct Oval Cut Chrysoberyl, 6.9 x 5.5 mm From Sri Lanka

0.42 carat Yellow Spessartite Garnet, Pear Shape loose Spessartite Garnet from Mozambique, Natural Untreated Gem, 5.1 x 4 mm

Gemstone Information

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