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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Gemstone Information

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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

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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

Easy to use.

Posted By Hope in March, 2024

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Overall Rating -> 10

I was pleased with the selection of gems, the ease of navigating, and the smooth checkout

Posted By JamesMichael781 in September, 2023

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Overall Rating -> 10

the searching format was easy to find what i needed. It helped to be able to sort Lowest price to Highest because i wasnt looking to spend too much but i did want an actual stone and not imitation.

Posted By PixelComposer in January, 2024

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Overall Rating -> 8

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

Posted By MI photo in May, 2023

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Overall Rating -> 9

It was simple and clear to understand.

Posted By Thora007 in December, 2023

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Overall Rating -> 10

It was easy to search and find what i wanted

Posted By Gunner in November, 2023

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Overall Rating -> 10

Purchased for my granddaughter she was very pleased with it.

Posted By Charlie in April, 2024

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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.

Posted By Ktreva52 in February, 2024

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Overall Rating -> 10

I have had and will always have a great time shopping at GemSelect. It's a great web site with great products and great service.

Posted By Apps in November, 2023

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Overall Rating -> 10

I was looking for a source for affordable genuine gemstones for my grandson who is currently very interested in rocks and gems. I was quite surprised and pleased to find GemSelect and finding the right stones at the right price couldn't have been simpler.

Posted By Papa in December, 2023

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Overall Rating -> 10

Everything fine.

Posted By Hilario in December, 2023

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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.

Posted By Meow in June, 2023

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Overall Rating -> 10

Found the stone I wanted which was delivered quickly and met expectations.

Posted By GemGrammy in January, 2024

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Gemstones A-Z

Buy Oval Shape 20x15 mm Gems

4.03 carat Pink Tourmaline, Round Cabochon loose Tourmaline from Mozambique, Natural Untreated Gem, 10.3 mm

0.22 ct Square Cut Iolite, 4.1 x 4 mm From Madagascar

0.56 ct Loose Violet Sapphire, 5.9 x 4.3 mm Oval Cut From Tanzania

48.28 ct Loose Brown Jasper, 38.2 x 24.6 mm Carved From India

10.16 ct Oval Cut Labradorite, 18.2 x 13.3 mm From Madagascar

19.52 ct Yellow Quartz, 14.3 x 14.2 mm Carved From Brazil

0.02 ct Loose Blue Diamond, 1.9 mm Diamond Cut From India

2.96 carat White Topaz, Cushion loose Topaz from Brazil, Natural Untreated Gems, 4.6 x 4.6 mm

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

2.37 ct Yellow Beryl, 9.2 mm Round Cut From Brazil

0.96 ct Octagon Cut Color-Change Diaspore, 6.6 x 4.6 mm From Turkey

1.27 carat Yellow Citrine, Trillion loose Citrine from Brazil, Natural Untreated Gem, 7.2 x 7.2 mm

62.65 carat Pear Dendritic Agate, loose Certified Dendritic Agate from India, Natural Untreated Gem, 36.8 x 34.5 mm

1.49 ct Oval Black Opal, 6.1 x 4.2 mm From Ethiopia

0.92 ct Loose Purple Spinel, 5.6 x 5.2 mm Cushion Cut From Tanzania

50.56 ct Yellow Quartz, 26.2 x 20.2 mm Oval Cut From Brazil

10.57 ct Yellow Quartz, 15.2 x 14.9 mm Carved From Brazil

2.46 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 8.9 x 7.5 mm

2.34 carat Blue Green Fluorite, Pear Shape loose Fluorite from India, Natural Untreated Gem, 9.9 x 7 mm

2.18 ct Blue Kyanite, 8 x 6.1 mm Oval Cut From Nepal

4.62 ct Yellow Agate, 11.7 x 10.2 mm Oval Cut From India

21.29 carat Ammolite, loose Certified Ammolite from Canada, Natural Gem, 28.4 x 17.9 mm

2.72 carat Sky Blue Topaz, Heart loose Topaz from Brazil, Natural Gem, 8.9 x 9 mm

9.64 carat Pear Rutile Quartz, loose Certified Rutile Quartz from India, Natural Untreated Gem, 16.5 x 12.2 mm

4.14 ct Oval Pietersite, 14.3 x 10.2 mm From Namibia

0.15 ct Black Diamond, 2.6 x 2.7 mm Princess Cut From India

2.66 carat Pink Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 7.5 x 6.9 mm

6.64 ct Oval Prehnite, 7.3 x 6.3 mm From South Africa

2.24 carat Blue Tanzanite, Oval loose Tanzanite from Tanzania, Natural Gems, 5.9 x 4 mm

2.78 carat White Topaz, Cushion loose Topaz from Brazil, Natural Untreated Gems, 4.6 x 4.6 mm

2.75 ct Oval Sillimanite Cat's Eye, 7.5 x 5.3 mm From Madagascar

2.42 ct Loose Orange Moonstone, 9.1 x 7.1 mm Cushion Cut From India

Gemstone Information

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