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

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

Posted By C.J. in February, 2024

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Overall Rating -> 10

No issues at all. It was great.

Posted By LJXK in May, 2023

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Overall Rating -> 10

blessed be the lord blessed be the saved blessed be the work blessed be the traveled i write down my good times in these stones and when times are gray i can still se the sunny days refract in these stones

Posted By Kickbass.2 in May, 2023

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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 -> 10

My last experience was good, in fact every experience I have had with them has met my expectations or surpassed them. These are really good people to work with.

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Overall Rating -> 10

Very good, very fast, everything as described.

Posted By B in October, 2023

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Overall Rating -> 9

Not easy enough to buy by exact size, and many stones aren't carbechon curved shape on top

Posted By Erick in July, 2023

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Overall Rating -> 10

it was good

Posted By Bobk in January, 2024

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Overall Rating -> 9

It was simple and clear to understand.

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Overall Rating -> 8

I am currently pleased. I like the layout of the website.

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Overall Rating -> 9

I have been buy from you for years

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Overall Rating -> 10

The website is very easy to use. The search function, filter and sort functions are very helpful.

Posted By Sboro in August, 2023

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Overall Rating -> 10

i love this site, the gems are always of good quality, i've been buy gifts from the site for 10 years, love it

Posted By Jf in January, 2024

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Overall Rating -> 8

purchased birthstones to be mounted into stud earrings as a gift for a friend's gift

Posted By MI photo in May, 2023

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Overall Rating -> 10

Everthing about researching and ordering from Gemselect was easy and uncomplicated. In the past I had payment problems, but your customer rep, Thomas, helped me get everything right. I will continue using Gemselet in the future for these reasons.

Posted By WildwillyfromArizona in August, 2023

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Gemstones A-Z

Buy Cushion Cut 12x10 mm Gems

5.05 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6.9 x 5.2 mm

3.79 ct Oval Prehnite, 8.5 x 7 mm From South Africa

4.91 carat Diamond-Cut Tsavorite Garnet, loose Certified Tsavorite Garnet from Kenya, Natural Untreated Gems, 2.2 mm

77.23 ct Oval Jasper, 36.5 x 31.4 mm From Indonesia

7.85 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 14.2 x 10.2 mm

3.51 ct Round Cut Strawberry Quartz, 8.1 mm From Russia

0.22 ct Oval Cut Kornerupine, 4.2 x 3.3 mm From Sri Lanka

3 carat Swiss Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 8.2 x 6.1 mm

19.84 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 16.3 x 13.9 mm

0.07 ct Black Diamond, 2.6 mm Diamond Cut From India

1.58 carat Blue Tanzanite, Pear Shape loose Tanzanite from Tanzania, Natural Gems, 5 x 3.8 mm

1.21 ct Brown Moonstone, 5.1 mm Round Cut From India

2.49 ct Oval Cut Strawberry Quartz, 8.2 x 6.2 mm From Russia

0.75 ct Purple Spinel, 5.1 mm Round Cut From Tanzania

4.16 ct Oval Onyx, 13.1 x 11.1 mm From Sri Lanka

7.32 ct Pink Morganite, 16.3 x 10.2 mm Oval Cut From Afghanistan

21.73 ct Oval Pietersite, 29.9 x 21.8 mm From Namibia

2.13 ct Cushion Cut Peridot, 8.2 x 6.6 mm From Myanmar

3.09 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7.2 x 5 mm

0.22 ct Black Diamond, 3.5 mm Diamond Cut From India

82.3 ct Oval Jasper, 46.7 x 28 mm From Indonesia

2.8 ct Red Andesine Labradorite, 10.3 x 8.3 mm Oval Cut From Congo

0.15 ct White Diamond, 2.7 mm Diamond Cut From Brazil

2.86 ct Loose Marquise Pietersite, 16.2 x 7.4 mm From Namibia

2.56 carat Oval Demantoid Garnet, loose Certified Demantoid Garnet from Namibia, Natural Untreated Gems, 6 x 4 mm

1.09 carat Pink Malaya Garnet, Marquise Cut loose Malaya Garnet from Tanzania, Natural Untreated Gem, 9 x 4.7 mm

3.52 ct Green Jade, 12.3 x 9.9 mm Oval Cut From Myanmar

0.44 ct Loose Orange Sapphire, 5.8 x 4.1 mm Oval Cut From Tanzania

25.6 ct Oval Rainbow Moonstone, 26.6 x 14.4 mm From the United States

2.25 carat London Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 9.1 x 7 mm

2.89 carat Orange Sapphire, Pear Shape loose Sapphire from Tanzania, Natural Gems, 7 x 4.7 mm

1.61 carat Pink Tourmaline, Oval loose Tourmaline from Mozambique, Natural Untreated Gem, 7.5 x 6.8 mm

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