Calibrated 12 x 10 mm Oval Shape Natural Loose Gemstones: GemSelect

Some people by gems by color or price, but for many, it is best to buy gems by shape and size - especially if you're in need of a gem to replace a previous item that was lost or damaged. Calibrated oval shapes, facet cut and cabochon gems available now in 12 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 usually 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 round shape settings will allow 0.3 mm or slightly higher even. This small variance can usually be accommodated for most 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 -> 7

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

Posted By Steve in November, 2023

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Overall Rating -> 10

Love Gem select. great gems for the price. Can't beet them

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Overall Rating -> 8

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

Posted By RayPoppa in January, 2024

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Overall Rating -> 10

Great selection of various gems, easy to navigate site

Posted By Josh in August, 2023

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Overall Rating -> 10

Best place to buy gem stones, dont bother shopping else where. Prices are great, no issues with shipping and customer service is the best.

Posted By J in December, 2023

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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

Love the variety of stones, sizes and the prices

Posted By Dorita in March, 2024

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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

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

Easy to use,I have spent many hours looking at the site

Posted By Skip in November, 2023

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Overall Rating -> 10

The gems were as described, which is kind of rare these days. I am happy with the purchase, and delevery on time.

Posted By T-bone in October, 2023

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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

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Overall Rating -> 10

Great Job today! No issues!

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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.

Posted By Kuba in December, 2023

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Overall Rating -> 10

I have actually done business with them before and was quite satisfied with them then.My Mother collected turtle items and when I saw the Mother of Pearl turtle...I just thought of her and decided to buy it. It's even tinier than I thought, but so adorable!The gemstones I bought are for jewelry for my daughter's birthday.

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Gemstones A-Z

Buy Oval Shape 12x10 mm Gems

1.94 carat Blue Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Gems, 4.5 mm

11.31 carat Carved Rose Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 14.3 x 13.6 mm

20.73 ct Oval Obsidian, 31.8 x 18.9 mm From the United States

1.01 ct Oval Sillimanite Cat's Eye, 6.4 x 6.2 mm From Madagascar

1.67 carat Yellow Citrine, Trillion loose Citrine from Brazil, Natural Untreated Gem, 8.4 x 8 mm

16.21 carat Pear Fossil Coral, loose Certified Fossil Coral from Indonesia, Natural Untreated Gems, 19.2 x 11.1 mm

37.71 ct Oval Malachite, 30.5 x 20.3 mm From Congo

1.43 ct Blue Apatite, 5 x 4 mm Oval Cut From Madagascar

2.85 carat Square Rhodolite Garnet, loose Certified Rhodolite Garnet from Mozambique, Natural Untreated Gems, 4.9 x 4.8 mm

0.59 ct Yellow Sphalerite, 5.7 x 4.6 mm Oval Cut From Spain

7.43 ct Oval Coral, 16.5 x 13.1 mm From Indonesia

3.32 carat Green Sapphire, Oval loose Sapphire from Tanzania, Natural Gems, 6.1 x 5 mm

3.78 ct Oval Cut Andalusite, 6 x 4.1 mm From Brazil

0.86 ct Oval Cut Carnelian, 7.8 x 6 mm From India

0.33 ct Loose Yellow Sapphire, 4.8 x 3.7 mm Octagon Cut From Tanzania

1.77 ct Oval Carnelian, 8.9 x 6.8 mm From India

1.3 ct Oval Cut Rainbow Moonstone, 8 x 6.2 mm From the United States

4.59 ct Oval Pietersite, 16.9 x 11.3 mm From Namibia

26.16 ct Cushion Tiger's Eye Matrix, 26.6 x 17.2 mm From Mexico

4.46 carat Orange Sapphire, Pear Shape loose Sapphire from Tanzania, Natural Gems, 5.1 x 3.2 mm

4.33 carat Princess-Cut Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 9.7 x 9.5 mm

34.18 ct Oval Hematite, 24.7 x 15.9 mm From Brazil

2.17 carat Pink Tourmaline, Emerald Cut loose Tourmaline from Tanzania, Natural Untreated Gem, 7.4 x 6.3 mm

0.26 ct Octagon Cut Kornerupine, 4.2 x 3 mm From Sri Lanka

1.43 ct Oval Cut Peridot, 8 x 6 mm From China

10.26 ct Yellow Quartz, 14.5 mm Odd Shaped From Brazil

7.62 ct Fancy Fire Agate, 16.6 x 11.3 mm From Mexico

1.14 ct Oval Sillimanite Cat's Eye, 7 x 4.5 mm From Madagascar

1.33 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 6 x 6 mm

1.35 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 16.4 x 3.2 mm

3.3 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 11 x 8.8 mm

42.48 ct Cushion Chrysocolla, 28.2 x 22.2 mm From Australia

Gemstone Information

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