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

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Posted By Ordain 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

Very Good

Posted By Julian in July, 2023

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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

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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.

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Overall Rating -> 9

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Overall Rating -> 10

Great selection of various gems, easy to navigate site

Posted By Josh in August, 2023

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Overall Rating -> 10

Todo muy bien en la compra ahora esperar recibir el pedido.

Posted By MAGSMX in August, 2023

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Overall Rating -> 10

I purchase all of my stones from GemSelect! They're the best I've found for both selection and value.

Posted By Terry in June, 2023

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Overall Rating -> 10

Everthing about researching and ordering from Gemselect was easy and uncomplicated. In the past I had payment problems, but your customer rep, Thomas, helped me get everything right. I will continue using Gemselet in the future for these reasons.

Posted By WildwillyfromArizona in August, 2023

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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.

Posted By Nikki J in September, 2023

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Overall Rating -> 10

Easy to use.

Posted By Hope in March, 2024

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Overall Rating -> 10

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

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Overall Rating -> 10

Convenient selection, arrival on time

Posted By Alin in February, 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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Gemstones A-Z

Buy Oval Shape 20x15 mm Gems

1.51 ct Marquise Cut Peridot, 7 x 3.5 mm From China

2.06 carat Emerald Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 5.8 x 3.8 mm

0.56 ct Loose Yellow Sapphire, 5.7 x 3.9 mm Oval Cut From Tanzania

10.56 ct Yellow Quartz, 19.4 mm Briolette From Brazil

1.8 carat Marquise Cut Ruby, loose Certified Ruby from Myanmar, Natural Gem, 11.6 x 5.4 mm

2.97 ct Multicolor Mystic Quartz, 10.1 x 10 mm Trillion Concave Cut From Brazil

2.22 ct Orange Sunstone, 8.9 mm Round Cut From India

1.27 ct Yellow Beryl, 8.2 x 7.9 mm Trillion Cut From Madagascar

6.85 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 14.5 x 10.9 mm

49.65 ct Pencil Cut Rainbow Moonstone, 42.3 x 11.9 mm From the United States

42.97 ct Pencil Cut Tiger's Eye, 30.7 mm From Thailand

5.16 ct Loose Oval Malachite, 12 x 10 mm From Congo

4.42 ct Yellow Quartz, 9.9 x 9.9 mm Asscher Cut From Brazil

1.32 ct Pink Morganite, 7.2 mm Round Cut From Afghanistan

2.7 ct Loose Pink Sapphire, 9.3 x 7.5 mm Oval Cut From Madagascar

4.67 ct Yellow Agate, 11.7 x 10.6 mm Oval Cut From India

5.31 ct Yellow Agate, 11.9 x 10.5 mm Oval Cut From India

1.71 ct Yellow Beryl, 8.2 mm Round Cut From Madagascar

1.01 ct Octagon Cut Peridot, 7 x 5.1 mm From China

1.54 ct Loose Green Tourmaline, 6.8 mm Round Cabochon From Mozambique

0.93 carat Yellow Citrine, Marquise Cut loose Citrine from Brazil, Natural Untreated Gems, 8.2 x 4.1 mm

11.43 carat Pear Onyx, loose Certified Onyx from Sri Lanka, Natural Gem, 19.1 x 14.5 mm

15.76 carat Carved Rose Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 16 x 16.7 mm

0.56 ct Brown Diamond, 4.3 mm Diamond Cut From India

0.97 carat Orange Moonstone, Pear Shape loose Moonstone from India, Natural Untreated Gem, 8.7 x 5.8 mm

6.08 ct Yellow Quartz, 11.4 x 11.1 mm Asscher Cut From Brazil

1.36 carat Sky Blue Topaz, Marquise Cut loose Topaz from Brazil, Natural Gem, 9.9 x 5.1 mm

1.95 carat Blue Tanzanite, Oval loose Tanzanite from Tanzania, Natural Gem, 9 x 6.9 mm

1.64 carat Heart Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 6 x 6.1 mm

1.76 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 23.7 x 3.1 mm

3.4 carat White Zircon, Diamond-Cut loose Zircon from Myanmar, Natural Gems, 6.6 mm

5.69 ct Blue Star Sapphire, 6.9 x 5.2 mm Oval Cut From Thailand

Gemstone Information

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