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 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

Source: Bizrate

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.

Posted By Spinach in May, 2023

Source: Bizrate

Overall Rating -> 10

the searching format was easy to find what i needed. It helped to be able to sort Lowest price to Highest because i wasnt looking to spend too much but i did want an actual stone and not imitation.

Posted By PixelComposer in January, 2024

Source: Bizrate

Overall Rating -> 10

Great website and information

Posted By Moonshot in December, 2023

Source: Bizrate

Overall Rating -> 10

I have received emails for about a year and today is the condition that had me decide on the purchase

Posted By Tim in April, 2024

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Overall Rating -> 10

it was good

Posted By Bobk in January, 2024

Source: Bizrate

Overall Rating -> 9

My first purchase went well. I will purchase more gems in the future.

Posted By NoHalalAl in March, 2024

Source: Bizrate

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

Source: Bizrate

Overall Rating -> 10

Great experience! First time buyer

Posted By Todi89 in February, 2024

Source: Bizrate

Overall Rating -> 10

I had a great time searching all the lovely stones. This is my first precious loose stone purchase for my own work. I chose sapphire, and found some lovely briolettes. I wanted 3, but this set of 4 was perfect. Everything was quick and easy, and I'm excited.

Posted By Phoenix in February, 2024

Source: Bizrate

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

Easy to navigate

Posted By G Funk in December, 2023

Source: Bizrate

Overall Rating -> 10

great. thank you

Posted By Carrotroller in July, 2023

Source: Bizrate

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.

Posted By Iggywiggly in January, 2024

Source: Bizrate

Overall Rating -> 10

Todo muy bien en la compra ahora esperar recibir el pedido.

Posted By MAGSMX in August, 2023

Source: Bizrate

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Gemstones A-Z

Buy Cushion Cut 12x10 mm Gems

0.96 carat Oval Opal, loose Certified Opal from Ethiopia, Natural Untreated Gem, 9.5 x 6.9 mm

1.06 carat Oval Opal, loose Certified Opal from Ethiopia, Natural Gem, 9.2 x 7.3 mm

1.01 ct Oval Cut Chrysoberyl, 6.9 x 5 mm From Sri Lanka

3.64 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 13.4 x 9.7 mm

12.14 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 18.6 x 14.2 mm

5.68 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 10.1 x 8.1 mm

4.02 ct Orange Moonstone, 8.2 x 8 mm Trillion Cut From India

30.43 ct Round Pietersite, 18.1 mm From Namibia

0.96 ct Blue Kyanite, 7 x 5.1 mm Oval Cut From Nepal

2.13 carat Orange Hessonite Garnet, Square loose Hessonite Garnet from Sri Lanka, Natural Untreated Gem, 6.9 x 6.7 mm

0.76 carat Yellow Citrine, Heart loose Citrine from Brazil, Natural Untreated Gem, 6.2 x 6 mm

3.99 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 6.5 x 4.6 mm

9.56 ct Round Petal Cut Smoky Quartz, 13.2 mm From Brazil

1.42 carat Pink Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 9.2 x 4.6 mm

0.26 ct Orange Sphalerite, 3.5 mm Round Cut From Spain

0.94 ct Green Sphene, 6 x 5.9 mm Oval Cut From Sri Lanka

0.98 carat Pink Morganite, Pear Shape loose Morganite from Afghanistan, Natural Untreated Gem, 10.1 x 5.2 mm

2.84 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 11.2 x 8.3 mm

14.74 ct Oval Malachite, 12 x 10 mm From Congo

3.33 carat Blue Sapphire, Briolette with Hole loose Sapphire from Madagascar, Natural Gems, 6 mm

0.39 ct Loose Pink Sapphire, 5.8 x 4.1 mm Oval Cut From Madagascar

23.6 carat Ammolite, loose Certified Ammolite from Canada, Natural Gem, 34.3 x 16.8 mm

31.37 ct Oval Obsidian, 29.2 x 19.9 mm From Mexico

0.44 ct Pink Spinel, 4.7 x 4 mm Cushion Cut From Tanzania

6.45 carat Barrel Cut Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 9 x 4.5 mm

0.65 ct Purple Spinel, 5.1 mm Round Cut From Tanzania

1.32 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 10 x 4.1 mm

0.85 carat Round Opal, loose Certified Opal from Ethiopia, Natural Untreated Gem, 6.7 mm

4.51 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 4.1 x 4 mm

0.7 ct Loose Yellow Sapphire, 6.2 x 4.1 mm Octagon Cut From Tanzania

1.19 carat Pear Shape Opal, loose Certified Opal from Ethiopia, Natural Untreated Gem, 8.9 x 6.9 mm

1.95 ct Orange Sunstone, 8.5 mm Round Cut From India

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