Calibrated 12 x 10 mm Cushion Shape Loose Natural Gemstones from G...

Some people by gems by color or price, but for many, it is best to buy gems by size - especially if you're in need of a gem to replace a previous item that was lost or damaged. Calibrated cushion shapes, facet cut and cabochon gems available now in 12 mm x 10 mm 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 meant nor 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 have used gm select a while ago and was always pleased with the products

Posted By Jaytee in November, 2023

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Overall Rating -> 9

I was in the market for birthstones for a lil gift project im doing. I'm no expert in gems or what not but the quality as far as i can tell seems to be spot on.

Posted By PixelComposer in January, 2024

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Overall Rating -> 10

The website was very easy to navigate. We appreciated the details about each gem, and the sort and search features of the website were helpful and easy to use.

Posted By AV in May, 2023

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Overall Rating -> 8

I did not realize how small the stone was. I cannot use it for the project I wanted, but I am keeping the stone and tru to use it in something else.

Posted By Mark in March, 2024

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Overall Rating -> 10

It was easy to search and find what i wanted

Posted By Gunner in November, 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 -> 10

Purchased for my granddaughter she was very pleased with it.

Posted By Charlie in April, 2024

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Overall Rating -> 10

Easy to use website, made it very easy to buy. Will shop here again.

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Overall Rating -> 10

Fine. All emails answered. Excellent service. Nice discount added for orders. Briefly, a very good experience.

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Overall Rating -> 10

Great Job today! No issues!

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Overall Rating -> 10

Pleasant.

Posted By Mk in November, 2023

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Overall Rating -> 9

Easy to use. Limited supply of higher quality gemstones.

Posted By Newfguy in February, 2024

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Overall Rating -> 10

The site is very easy to use and I will continue to shop here. The quality is superb

Posted By Genia 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

Found the stone I wanted which was delivered quickly and met expectations.

Posted By GemGrammy in January, 2024

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Gemstones A-Z

Buy Cushion Cut 12x10 mm Gems

1.71 ct Oval Cut Rainbow Moonstone, 9.2 x 7.1 mm From the United States

1.54 carat Pink Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 11.7 x 4.5 mm

1.03 carat Square Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 6 x 5.9 mm

75.13 ct Oval Jasper, 31.9 x 24.9 mm From Indonesia

0.56 ct Octagon Cut Peridot, 5.9 x 4 mm From China

12.29 ct Blue Green Grandidierite, 17.1 x 12.8 mm Oval Cut From Madagascar

8.35 ct Oval Tiger's Eye, 18.2 x 13.4 mm From India

5.05 carat White Topaz, Square loose Topaz from Brazil, Natural Untreated Gems, 4.1 x 4.1 mm

0.91 carat Pear Shape Peridot, loose Certified Peridot from China, Natural Untreated Gems, 5.9 x 4.1 mm

3.07 carat White Topaz, Cushion loose Topaz from Brazil, Natural Untreated Gems, 4.6 x 4.5 mm

6.26 carat Swiss Blue Topaz, Heart loose Topaz from Brazil, Natural Gems, 9 x 8.9 mm

4.38 ct Orange Sunstone, 11.7 x 9.8 mm Oval Cut From India

6.51 carat Sky Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 10 x 8 mm

1.23 ct Orange Moonstone, 6.3 mm Round Cut From India

3.62 carat Red Malaya Garnet, Round loose Malaya Garnet from Tanzania, Natural Untreated Gems, 5.5 mm

0.22 ct Blue Apatite, 3.6 mm Round Cut From Madagascar

1.67 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6.1 x 4.1 mm

8.84 ct Loose Oval Agate, 13.3 x 11.9 mm From Indonesia

1.75 carat Yellow Citrine, Marquise Cut loose Citrine from Brazil, Natural Untreated Gems, 9 x 5 mm

0.02 ct Green Diamond, 1.6 mm Diamond Cut From India

14.02 ct Yellow Quartz, 13.1 x 12.6 mm Carved From Brazil

0.5 ct Loose Round Pietersite, 5.7 mm From Namibia

4.92 carat Barrel Cut Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 9.1 x 4.5 mm

15.62 carat Ammolite, loose Certified Ammolite from Canada, Natural Gem, 23 x 15.6 mm

5.42 ct Yellow Quartz, 12 mm Round Concave Cut From Brazil

2.16 ct Round Cut Andalusite, 4.1 mm From Brazil

15.02 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 14 x 10.1 mm

9.94 ct Loose Oval Lapis Lazuli, 14.9 x 11.1 mm From Afghanistan

3.51 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gem, 13.9 x 8.2 mm

1.23 ct Blue Kyanite, 7.1 x 5 mm Oval Cut From Nepal

10.99 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 14.2 x 10.5 mm

5.51 ct Orange Sunstone, 9 mm Round Cut From India

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