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 -> 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

Source: Bizrate

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 -> 10

Pleasant.

Posted By Mk in November, 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

Source: Bizrate

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

Source: Bizrate

Overall Rating -> 10

Easy to use website, made it very easy to buy. Will shop here again.

Posted By Bjorn in January, 2024

Source: Bizrate

Overall Rating -> 10

Great selection

Posted By GHS40 in December, 2023

Source: Bizrate

Overall Rating -> 9

Overall good, shipping prices just seem a little on the high side.

Posted By Steve in August, 2023

Source: Bizrate

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.

Posted By ChiChi in January, 2024

Source: Bizrate

Overall Rating -> 10

The website is well organized and works fast forward and back. Plenty of filters. Each gem is described in detail and you receive the one pictured. Gem material info and sources available. I would like to see more specifics on sources besides country- at least region or state and in the US with Turquiose which mine. Thanks!

Posted By Orchidisle in February, 2024

Source: Bizrate

Overall Rating -> 10

Was easy to search for many gems and mineral stones.Authenticity of natural stones is important, and I feel this site offers some assurance on this.

Posted By DanM in November, 2023

Source: Bizrate

Overall Rating -> 10

I FOUND WHAT I WANT IT

Posted By GABY in March, 2024

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Overall Rating -> 10

first time here sooooooooooo we will seeeee!!!!! so far so good!!!!!!

Posted By Seastone 56 in October, 2023

Source: Bizrate

Overall Rating -> 9

An it was good.

Posted By Miguel in June, 2023

Source: Bizrate

Overall Rating -> 7

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

Posted By Steve in November, 2023

Source: Bizrate

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Gemstones A-Z

Buy Oval Shape 12x10 mm Gems

4.71 carat Trillion Rhodolite Garnet, loose Certified Rhodolite Garnet from Mozambique, Natural Untreated Gems, 5.2 x 5 mm

8.51 ct Heart Rose Cut Onyx, 10.4 x 10.3 mm From Sri Lanka

0.91 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 7.7 x 4.4 mm

15.27 ct Oval Rose Quartz, 16.8 x 13.7 mm From South Africa

1.69 carat Sky Blue Topaz, Heart loose Topaz from Brazil, Natural Gems, 4 x 3.9 mm

1.11 carat Pear Shape Opal, loose Certified Opal from Australia, Natural Untreated Gem, 12 x 7.1 mm

6.77 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 16 x 11.9 mm

1.18 ct Loose Oval Cut Black Opal, 10.1 x 7.4 mm From Ethiopia

30.1 ct Loose Round Labradorite, 25.2 mm From Madagascar

1.94 carat Heart Buff Top Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 8.1 x 8.1 mm

6.48 ct Black Star Sapphire, 11.5 x 8.8 mm Oval Cut From Thailand

0.98 ct Blue Kyanite, 7.2 x 5 mm Oval Cut From Nepal

4.35 ct Pink Morganite, 10.3 mm Round Cut From Afghanistan

0.9 ct Cushion Cut Smoky Quartz, 6.1 x 6.1 mm From Brazil

3.69 ct Round Checkerboard Smoky Quartz, 8 mm From Brazil

3.68 carat Swiss Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gem, 15 x 7 mm

1.39 ct Blue Star Sapphire, 7.1 x 5.1 mm Oval Cut From Thailand

23.21 ct Odd Shaped Jasper, 29.5 x 16.6 mm From India

16.04 ct Pencil Cut Tiger's Eye, 20.9 x 8.8 mm From Thailand

41.38 ct Oval Star Rose Quartz, 22 x 16.9 mm From South Africa

1.23 carat Purple Tourmaline, Oval loose Tourmaline from Mozambique, Natural Untreated Gem, 8.2 x 6.1 mm

2.55 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 9.9 x 8.1 mm

19.1 ct Loose Pear Labradorite, 16 x 11.7 mm From Madagascar

8.12 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6.2 x 4.2 mm

1.97 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 7.8 x 6 mm

1.76 carat White Zircon, Diamond-Cut loose Zircon from Myanmar, Natural Gem, 7 mm

0.78 ct Loose White Sapphire, 4.4 mm Diamond Cut From Madagascar

0.56 ct Loose Orange Sapphire, 4.2 x 4.2 mm Cushion Cut From Tanzania

27.58 ct Square Hematite, 16.5 x 16.4 mm From Brazil

0.68 ct Loose Yellow Sapphire, 6.1 x 5 mm Oval Cut From Tanzania

6.44 ct Marquise Slice Ruby in Fuchsite, 13.5 x 6.7 mm From Ethiopia

5.72 ct Oval Strawberry Quartz, 11 x 9.2 mm From Brazil

Gemstone Information

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