Calibrated 20 x 15 mm Oval Shape Natural Loose Gemstones: GemSelect

Some people by gems by color or pricze, 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 20 x 15 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

purchased birthstones to be mounted into stud earrings as a gift for a friend's gift

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Overall Rating -> 10

The site was easy to shop and the payment was secure. I’m looking forward to receiving my order!

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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.

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Overall Rating -> 9

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

Posted By Steve in August, 2023

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Overall Rating -> 10

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Overall Rating -> 10

Fantastic dealer for quality gemstones. Website is easy to navigate, selection is superb, delivery of purchases is prompt. Easy to select incorrect payment options, however.

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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 -> 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

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Overall Rating -> 10

Very excited and impressed with all your products. Keep up the good work....more different stones to choose from. I like Cabachons.

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Easy and fast

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Overall Rating -> 10

I find the website user friendly.

Posted By Becky in August, 2023

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Overall Rating -> 10

LOVE YOU GUYS. YOU CARRY EVERY GEMSTON I WANT. THE PRICE IS GREAT,THE PRODUCT IS OUTSTANDING,AND THE SERVICE CANT BE BEET.

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Overall Rating -> 10

Convenient selection, arrival on time

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Overall Rating -> 10

Great Job today! No issues!

Posted By Samlovesgems777 in August, 2023

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Overall Rating -> 10

GemSelect has the Best gems. Clear photos and detailed description helps me make the best choice. I have Never been disappointed by thier quality items.

Posted By Rock Hound in July, 2023

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Gemstones A-Z

Buy Oval Shape 20x15 mm Gems

7.63 ct Round Quartz Cat's Eye, 12 mm From India

6.4 carat Pear Pietersite, loose Certified Pietersite from Namibia, Natural Untreated Gems, 15.5 x 10.7 mm

1.48 ct Blue Apatite, 5.1 x 4 mm Oval Cut From Madagascar

0.84 ct Loose White Sapphire, 4.5 mm Diamond Cut From Madagascar

0.85 carat Yellow Morganite, Pear Shape loose Morganite from Afghanistan, Natural Untreated Gem, 7.8 x 5.9 mm

1 carat Yellow Citrine, Cushion loose Citrine from Brazil, Natural Untreated Gems, 5.1 x 5 mm

32.32 ct Oval Checkerboard Nuummite, 23.8 x 18.5 mm From India

10.92 ct Oval Lapis Lazuli, 16.9 x 12.3 mm From Afghanistan

1.22 ct Loose Round Cut Smoky Quartz, 7.1 mm From Brazil

1.68 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 7.9 x 6 mm

0.99 carat London Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 5.9 x 4 mm

2.27 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 5.9 x 4 mm

2.36 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 10.1 x 8.1 mm

0.86 carat London Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gem, 7.1 x 5.1 mm

41.46 ct Fancy Jasper, 37.1 x 19 mm From Indonesia

4.92 ct Round Cut Peridot, 5.8 mm From China

0.75 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 5.8 x 3.9 mm

2.57 ct Green Sphene, 8.2 x 7.2 mm Oval Cut From Sri Lanka

2.3 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 7 x 5.1 mm

4.69 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6 x 4.1 mm

0.57 carat Orange Citrine, Marquise Cut loose Citrine from Brazil, Natural Untreated Gem, 8.1 x 4.2 mm

8.05 ct Rainbow Pyrite, 17.5 x 11.7 mm From Russia

2.78 ct Loose Princess Cut Sapphire, 2.7 x 2.6 mm From Tanzania

1.77 carat Swiss Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 8.1 x 6.1 mm

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

5.06 ct Oval Rutile Quartz, 13 x 9 mm From India

0.47 carat Orange Spessartite Garnet, Oval loose Spessartite Garnet from Mozambique, Natural Untreated Gems, 4 x 3.2 mm

1.73 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7.1 x 5.1 mm

3.91 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 6 x 4.1 mm

26.31 ct White Amazonite, 32.4 mm Pencil Cut From Madagascar

94.12 ct Yellow Quartz, 37.4 x 25.2 mm Oval Portuguese Cut From Brazil

17.12 ct Oval Rose Quartz, 18.6 x 13.6 mm From South Africa

Gemstone Information

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