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 -> 9

I am of the opinion that the company gem select cares about the product beautiful gems it sells and the cost of the gem I purchased was small i was treated as if it cost a lot of money and product was described in detail and i felt good about the little stones i had ordered.

Posted By Sparkle in March, 2024

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Overall Rating -> 10

It was easy to find the color gem I desired and checkout was simple as well. Very excited to receive my gemstone.

Posted By Nikki J in September, 2023

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Overall Rating -> 10

Great selection

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Overall Rating -> 10

Trustworthy site. I've had several good experiences with company. Products always have met my expectations. Thank you.

Posted By Ray in February, 2024

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Overall Rating -> 9

So many gorgeous stones! The only "complaint" I have is it's difficult to visualize sizes in mm. Perhaps some way to compare in inches?It has been a long time since I bought stones from Gem select, but the process wasn't too difficult.

Posted By Ktreva52 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

Great site

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Overall Rating -> 8

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

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Overall Rating -> 10

Found what I was looking for

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Overall Rating -> 9

Good interaction with site

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Overall Rating -> 10

Everything was fine.

Posted By Matt in March, 2024

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Overall Rating -> 10

Overall, the whole process was just great.

Posted By Thatoneguy in August, 2023

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Overall Rating -> 9

over the experience was similar to other sites i have used. The only real note I have is the checkout experience was tedious and discriminatory, i wouldn't accept visa gift cards, which not only have guaranteed funds but help protect from misuse of personal information, but would not accept my visa b/c it is a prepaid card. I don't have bank account and I have been using the prepaid card for years without issue so this was disappointing to me. I feel safer using reputable gem sites rather than amazon or ebay (I have been sold fake gems with fake certs on both), but not being able to use my own valid legitimate funds and having to find a friend to buy for me b/c I use a non-bank card like 40% of the country is insulting.

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Overall Rating -> 10

Great selection and excellent website.

Posted By JBW in October, 2023

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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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Gemstones A-Z

Buy Cushion Cut 12x10 mm Gems

1.44 ct Blue Star Sapphire, 7 x 5.3 mm Oval Cut From Thailand

1.34 carat Pear Shape Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 7 x 4.8 mm

1.63 carat Trillion Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 8.1 x 8.1 mm

0.85 carat Oval Opal, loose Certified Opal from Australia, Natural Untreated Gems, 6.6 x 4.8 mm

11.65 ct Green Jadeite, 18.7 x 13.9 mm Oval Cut From Myanmar

0.79 carat Princess-Cut Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 5.8 x 5.7 mm

10.2 ct Carved Prehnite, 16.8 x 12.1 mm From South Africa

4.01 ct Loose Orange Moonstone, 9.1 x 7.1 mm Cushion Cut From India

0.73 carat Blue Sapphire, Oval loose Sapphire from Sri Lanka, Natural Gem, 6.1 x 4.2 mm

2.97 carat Yellow Citrine, Heart Buff Top loose Citrine from Brazil, Natural Untreated Gem, 9.2 x 9.1 mm

1.62 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6.1 x 4.2 mm

11.24 ct Fancy Boulder Opal, 16.7 x 13.8 mm From Australia

3.95 carat Carved Leaf Ruby, loose Certified Ruby from Madagascar, Natural Gems, 12.8 x 7.9 mm

1.73 ct Round Cut Strawberry Quartz, 7.9 mm From Russia

3.74 carat Swiss Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7.1 x 5.2 mm

9.24 ct Carved Chalcedony, 16.5 x 16.2 mm From Brazil

1.84 carat Orange Hessonite Garnet, Square loose Hessonite Garnet from Sri Lanka, Natural Untreated Gems, 3.8 x 3.7 mm

0.71 carat Oval Emerald, loose Certified Emerald from Colombia, Natural Gem, 6.2 x 5.2 mm

0.54 carat Orange Spessartite Garnet, Oval loose Spessartite Garnet from Mozambique, Natural Untreated Gem, 5 x 4.1 mm

26.22 carat Pear Lepidolite, loose Certified Lepidolite from the United States, Natural Untreated Gem, 34.7 x 24.1 mm

1 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 6.9 x 4.8 mm

29.72 ct Yellow Jadeite, 39.3 x 15.6 mm Carved From Myanmar

1.44 carat Swiss Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 7.6 x 5.8 mm

93.86 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 35.2 x 28.1 mm

2.94 carat Orange Zircon, Emerald Cut loose Zircon from Tanzania, Natural Untreated Gems, 7.1 x 4.9 mm

2.24 ct Orange Sunstone, 8.9 mm Round Cut From India

1.54 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 19.6 x 3.4 mm

0.54 ct Loose Yellow Sapphire, 3.3 x 3.2 mm Princess Cut From Tanzania

0.48 ct Loose Purple Sapphire, 4.8 mm Round Cut From Madagascar

0.62 carat London Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gem, 8 x 4 mm

4.55 ct Orange Sunstone, 10.8 mm Round Cut From India

1.33 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 4.9 x 4.9 mm

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