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 -> 9

It went well

Posted By Rob in December, 2023

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Overall Rating -> 10

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

Posted By Chico in May, 2023

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Overall Rating -> 9

I am of the opinion that the company gem select cares about the product beautiful gems it sells and the cost of the gem I purchased was small i was treated as if it cost a lot of money and product was described in detail and i felt good about the little stones i had ordered.

Posted By Sparkle in March, 2024

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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 -> 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

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

Easy to find the stones I was looking for. Always good quality stones

Posted By Erin in June, 2023

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Overall Rating -> 10

The gem stone always has a great selection of beautiful stones. The calibrated stone fit my ring perfectly. Thank you gem select !

Posted By Jen in August, 2023

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Overall Rating -> 9

So many gorgeous stones! The only "complaint" I have is it's difficult to visualize sizes in mm. Perhaps some way to compare in inches?It has been a long time since I bought stones from Gem select, but the process wasn't too difficult.

Posted By Ktreva52 in February, 2024

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Overall Rating -> 10

I love GemSelect, photos and details are great.

Posted By #1 in February, 2024

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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

Source: Bizrate

Overall Rating -> 10

it was good

Posted By Bobk in January, 2024

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Overall Rating -> 10

I have used GemSelect for several years and plan to shop more in the further. This is a good source of information on gemstones. I love looking at and learning about them. Lot more than I ever knew existed.

Posted By Bikerwalrus in October, 2023

Source: Bizrate

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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Overall Rating -> 10

Love gemselect

Posted By Joshua Howard in March, 2024

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Gemstones A-Z

Buy Oval Shape 20x15 mm Gems

0.8 ct Pink Spinel, 5.8 x 4.9 mm Cushion Cut From Tanzania

5.62 ct Yellow Quartz, 12.2 x 12.1 mm Octagon Concave Cut From Brazil

2.02 carat Pink Tourmaline, Oval loose Tourmaline from Mozambique, Natural Untreated Gem, 8.2 x 7.3 mm

4.06 ct Asscher Cut Rose Quartz, 9.6 x 9.6 mm From South Africa

0.76 ct Loose Violet Sapphire, 5.7 x 4.8 mm Oval Cut From Madagascar

0.87 carat London Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 7 x 5 mm

2.54 ct Loose Pink Sapphire, 7.4 mm Round Cut From Madagascar

1.19 ct Loose Oval Cut Black Opal, 9.5 x 7.1 mm From Ethiopia

1.15 carat Green Sapphire, Round loose Sapphire from Tanzania, Natural Gems, 4.1 mm

3.84 carat White Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Gems, 5.5 mm

2.52 carat Pear Prehnite, loose Certified Prehnite from South Africa, Natural Untreated Gem, 8.7 x 6.4 mm

11.97 carat Carved Fish Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 19.3 x 15.3 mm

2.51 ct Yellow Andesine Labradorite, 10 x 7.6 mm Oval Cut From Congo

5.81 ct Odd Shaped Hemimorphite Druzy, 14.4 x 10.1 mm From Congo

3.16 carat Yellow Citrine, Trillion loose Citrine from Brazil, Natural Untreated Gems, 8.2 x 8 mm

1.7 ct Oval Sillimanite Cat's Eye, 6.5 x 4.4 mm From Madagascar

2.25 ct Cushion Cut Peridot, 8.5 x 6.9 mm From Myanmar

4.95 ct Round Cut Smoky Quartz, 11.7 mm From Brazil

15.04 ct Oval Psilomelane Dendrite, 25.3 x 16.8 mm From Mexico

33.07 carat Baguette Cut Opal, loose Certified Opal from Australia, Natural Untreated Gem, 25 x 22.1 mm

53.13 ct Green Agate, 29.2 x 22.9 mm Oval Cut From India

5.21 carat Blue Tanzanite, Oval loose Tanzanite from Tanzania, Natural Gems, 9.1 x 7.1 mm

5.54 ct Yellow Quartz, 15.1 x 10.3 mm Carved From Brazil

1.05 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 4.2 x 4.1 mm

7.78 carat Blue Topaz, Emerald-Cut loose Topaz from Brazil, Natural Gems, 9.8 x 7.9 mm

5.28 carat Oval Opal, loose Certified Opal from Australia, Natural Untreated Gem, 15.8 x 11.7 mm

1.31 carat Oval Opal, loose Certified Opal from Ethiopia, Natural Untreated Gem, 8.9 x 6.8 mm

0.79 ct Orange Sphalerite, 5.3 mm Round Cut From Spain

8.27 ct Loose Round Agate, 11.6 mm From Indonesia

0.56 carat Pear Shape Color-Change Garnet, loose Certified Color-Change Garnet from Tanzania, Natural Untreated Gem, 6 x 4.1 mm

2.3 ct Orange Agate, 8 x 6.1 mm Oval Cut From India

24.77 ct Oval Jasper, 29.8 x 20.5 mm From Indonesia

Gemstone Information

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Gemstone EDUCATION

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