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

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 -> 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 -> 7

I placed order#384714 based on the picture on your website and the stone came in much darker. I'm sure it's the same stone i ordered but your lighting made it seem a lighter blue. I was trying to match a stone for a customer and based on the picture it would have been close enough but the stone in person is a mile off.

Posted By Bobk in February, 2024

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Overall Rating -> 8

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

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Overall Rating -> 10

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Overall Rating -> 10

Great selection, I love your site! Great product visibility, information, etc.

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Perfect size I was looking for and great price

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Overall Rating -> 10

My overall interaction with your website was pleasant, as always.

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Overall Rating -> 10

Wonderful selection of gems to choose from. Have made many purchases and was only slightly disappointed once.

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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.

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Overall Rating -> 7

I feel pretty good so far, pending the delivery of the item ordered.

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Overall Rating -> 10

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Overall Rating -> 9

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Overall Rating -> 10

The website design is a bit finicky for mobile, but Im sure its most likely just a mobile issue. Amazing selection of products, great prices.

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Gemstones A-Z

Buy Cushion Cut 12x10 mm Gems

1.57 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 10.1 x 6.8 mm

21 ct Oval Quartz With Marcasite, 22.8 x 16.2 mm From Brazil

24.97 ct Cushion Coral, 20.7 x 13.6 mm From Indonesia

0.62 carat Princess-Cut Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 5.1 x 5.1 mm

4.18 ct Oval Spectrolite, 10.1 x 8.3 mm From Finland

2.75 ct Loose Square Cut Sapphire, 3 x 2.9 mm From Tanzania

3.04 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 11.1 x 9.1 mm

2.19 ct Loose Yellow Sapphire, 4.6 mm Round Cut From Thailand

5.31 ct Octagon Cut Rose Quartz, 10.6 x 10.6 mm From South Africa

4.11 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 13 x 9.2 mm

2.31 carat Yellow Citrine, Square loose Citrine from Brazil, Natural Untreated Gem, 7.9 x 7.8 mm

5 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 14.1 x 10.1 mm

3.25 ct Orange Moonstone, 8.1 x 7.9 mm Trillion Cut From India

0.92 carat Oval Emerald, loose Certified Emerald from Zambia, Natural Gem, 7.2 x 5.1 mm

1.22 ct Loose Orange Sapphire, 5.9 x 4 mm Oval Cut From Tanzania

4.09 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 11.4 x 9.2 mm

7.44 carat Marquise Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 11.9 x 6.1 mm

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

0.27 carat Oval Tsavorite Garnet, loose Certified Tsavorite Garnet from Tanzania, Natural Untreated Gem, 5 x 3.1 mm

2.13 ct Orange Moonstone, 9 x 7.2 mm Cushion Cut From India

4.17 carat Pear Larimar, loose Certified Larimar from the Dominican Republic, Natural Untreated Gem, 13 x 8.9 mm

1.33 ct Yellow Beryl, 8.1 x 7.8 mm Trillion Cut From Brazil

3.24 ct Round Onyx, 6.9 mm From Sri Lanka

1.28 ct Orange Sphalerite, 6.1 mm Round Cut From Spain

21.95 ct Carved Chalcedony, 13.4 x 13.2 mm From Brazil

2.18 ct Orange Moonstone, 8.1 x 8.1 mm Cushion Cut From India

0.92 ct Loose Purple Sapphire, 5.1 x 4.1 mm Oval Cut From Madagascar

4.53 carat Marquise Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 10 x 5.1 mm

15.61 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 20.3 x 12.4 mm

1.47 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 9 x 7 mm

22.28 carat Ammolite, loose Certified Ammolite from Canada, Natural Gem, 37.9 x 15.5 mm

9.6 ct Oval Cut Strawberry Quartz, 12.1 x 10.2 mm From Russia

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