Calibrated 16 x 12 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 16 x 12 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 -> 10

Very Good

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Overall Rating -> 10

Perfect size I was looking for and great price

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Overall Rating -> 10

Selection ability was straightforward and easy.

Posted By Dave in May, 2023

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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

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Overall Rating -> 10

Had a problem ordering first time. Someone from Gem Select reached out to me and cleared problem and I made purchase.

Posted By Myrtle in February, 2024

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Overall Rating -> 9

Everything was good but since I am still new I was surprised at how small the stones where.

Posted By Js in May, 2023

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Awesome

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Overall Rating -> 10

Website was incredibly easy and fast to use. Navigation and product outlay was simple and enjoyable to browse. Thank you and have a blessed day!

Posted By Devi in October, 2023

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Overall Rating -> 10

I’ve enjoyed purchasing stones from this site. It’s convenient and fairly priced.

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

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Overall Rating -> 10

I love the clear description of the certification options. It's very rare to see a gem site that offers a deep explanation of each institution that would certify the stone(s).

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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 -> 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

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

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Gemstones A-Z

Buy Oval Shape 16x12 mm Gems

0.73 ct Cushion Cut Color-Change Diaspore, 6.9 x 5 mm From Turkey

2.59 carat Pear Shape Opal, loose Certified Opal from Australia, Natural Untreated Gem, 13.7 x 9.1 mm

0.66 carat Violet Sapphire, Pear Shape loose Sapphire from Tanzania, Natural Gem, 6 x 4.8 mm

0.59 ct Yellow Sphalerite, 5.3 x 4.3 mm Oval Cut From Spain

0.78 ct Oval Chocolate Opal, 8 x 6 mm From Ethiopia

0.85 ct Loose Round Cut Lapis Lazuli, 6 mm From Afghanistan

5.59 ct Loose Oval Agate, 11.9 x 10.2 mm From Indonesia

2.93 carat Trillion Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 10.1 x 10 mm

1.62 carat Oval Opal, loose Certified Opal from Ethiopia, Natural Gem, 11.5 x 7.8 mm

1.7 ct Round Cut Strawberry Quartz, 8.1 mm From Russia

0.6 carat Orange Sapphire, Pear Shape loose Sapphire from Tanzania, Natural Gem, 5.9 x 4.2 mm

1.45 carat Yellow Citrine, Marquise Cut loose Citrine from Brazil, Natural Untreated Gems, 5.9 x 3.1 mm

0.52 carat London Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gem, 7 x 3.6 mm

0.57 ct Octagon Cut Peridot, 6 x 4.1 mm From China

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

1.82 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 4.9 x 4.8 mm

1.4 carat Yellow Citrine, Baguette Cut loose Citrine from Brazil, Natural Untreated Gem, 9.7 x 5.1 mm

0.99 carat Green Sapphire, Pear Shape loose Sapphire from Madagascar, Natural Gem, 7.1 x 5.1 mm

3.55 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 6.1 x 4.3 mm

3.04 ct Oval Prehnite, 9 x 7.8 mm From South Africa

9.55 ct Carved Prehnite, 13 x 12.2 mm From South Africa

0.86 carat Pear Shape Peridot, loose Certified Peridot from China, Natural Untreated Gems, 6.1 x 4.1 mm

2.05 carat Marquise Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 10 x 5 mm

1.39 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 7 x 5.2 mm

8.35 ct Round Agate, 12.1 mm From Indonesia

1.27 ct Oval Sillimanite Cat's Eye, 7.4 x 4.7 mm From Madagascar

44.23 ct Loose Pencil Cut Rainbow Moonstone, 42.2 x 11.6 mm From the United States

1.91 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 20.4 x 3.5 mm

2.23 ct Green Sphene, 7.7 x 6.4 mm Oval Cut From Sri Lanka

3.01 ct Blue Kyanite, 10 x 7.6 mm Oval Cut From Nepal

22.7 carat Emerald Cut Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 19.9 x 15.1 mm

3.84 carat White Zircon, Diamond-Cut loose Zircon from Colombia, Natural Gems, 6.8 mm

Gemstone Information

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