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 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

Convenient selection, arrival on time

Posted By Alin in February, 2024

Source: Bizrate

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

Source: Bizrate

Overall Rating -> 10

Easy to use.

Posted By Hope 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

Source: Bizrate

Overall Rating -> 10

Gem Select has gems at afffordable prices.

Posted By George in March, 2024

Source: Bizrate

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

Source: Bizrate

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

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

Great experience! First time buyer

Posted By Todi89 in February, 2024

Source: Bizrate

Overall Rating -> 10

Very large selection of items and we used the stones to have several pieces of jewelry made for us.

Posted By Joe in January, 2024

Source: Bizrate

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

I loved the opportunity to shop on a website that I could trust 👍

Posted By Will J. Lover in September, 2023

Source: Bizrate

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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Gemstones A-Z

Buy Oval Shape 12x10 mm Gems

2.55 ct Loose Yellow Sapphire, 5 mm Round Cut From Tanzania

0.76 ct Purple Spinel, 6.1 x 4.7 mm Oval Cut From Tanzania

1.44 ct Oval Cut Rainbow Moonstone, 8.1 x 6.1 mm From the United States

1.51 ct Violet Spinel, 6.7 x 6.4 mm Cushion Cut From Tanzania

0.84 ct Oval Sillimanite Cat's Eye, 7 x 4.9 mm From Madagascar

0.69 carat Emerald Cut Emerald, loose Certified Emerald from Colombia, Natural Gem, 5 x 5 mm

0.98 carat Yellow Citrine, Emerald Cut loose Citrine from Brazil, Natural Untreated Gem, 12.1 x 4.2 mm

3.65 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Gems, 9.1 x 7 mm

1 carat Pink Morganite, Pear Shape loose Morganite from Afghanistan, Natural Untreated Gem, 10.6 x 4.9 mm

1.72 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 18.4 x 3.4 mm

1.73 carat Orange Hessonite Garnet, Round loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.1 mm

17.09 ct Oval Serpentine, 27.6 x 17 mm From the United States

0.97 carat Oval Emerald, loose Certified Emerald from Colombia, Natural Gem, 6.8 x 5.7 mm

1.99 carat Sky Blue Topaz, loose Topaz from Brazil, Natural Gems, 7.3 x 5.2 mm

2.5 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 10.1 x 8.1 mm

20.83 ct Yellow Aventurine, 34.1 x 8.9 mm Pencil Cut From Brazil

3.82 ct Yellow Moonstone, 11.8 x 6.7 mm Oval Cut From India

0.5 carat Violet Sapphire, Pear Shape loose Sapphire from Tanzania, Natural Gem, 6.2 x 4.9 mm

3.2 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 11 x 8.9 mm

1.93 carat Round Opal, loose Certified Opal from Ethiopia, Natural Untreated Gems, 6.1 mm

2.28 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 6.2 x 4.2 mm

7.01 ct Purple Kunzite, 14.2 x 9 mm Oval Cut From Afghanistan

1.2 ct Oval Cut Kornerupine, 7.3 x 6.1 mm From Sri Lanka

63.33 ct Carved Rose Quartz, 35.7 x 21.4 mm From South Africa

0.63 ct Oval Cut Color-Change Diaspore, 6.5 x 4.1 mm From Turkey

1.43 carat Pear Shape Opal, loose Certified Opal from Ethiopia, Natural Untreated Gem, 13.3 x 8.9 mm

3.09 carat Swiss Blue Topaz, Half Moon loose Topaz from Brazil, Natural Gem, 9.7 x 7.7 mm

8.12 ct Round Checkerboard Smoky Quartz, 14.1 mm From Brazil

3.74 ct Square Cut Rainbow Moonstone, 3.2 x 3.2 mm From Sri Lanka

0.09 ct Black Diamond, 2.7 mm Diamond Cut From India

4.28 carat Pear Shape Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gem, 13.2 x 10.5 mm

1.77 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 8 x 5.9 mm

Gemstone Information

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Gemstone EDUCATION

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