Calibrated 8 mm Round Shape Loose Natural Gemstones from 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 Round shapes, facet cut and cabochon gems available now in 8 mm diameter 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 around 0.3 mm or slightly higher even. This small variance can usually be accommodated for 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

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

This is only the second time I have ordered from GemSelect. I am a prolific gemstone collector and I wish I had found this site sooner!

Posted By Beachcomber in September, 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 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).

Posted By Oakcityceo in May, 2023

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Overall Rating -> 10

Easy and fast

Posted By Mark in February, 2024

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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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Overall Rating -> 10

Was easy to search for many gems and mineral stones.Authenticity of natural stones is important, and I feel this site offers some assurance on this.

Posted By DanM in November, 2023

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Overall Rating -> 10

Easy to use.

Posted By Hope in March, 2024

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Overall Rating -> 10

The website is easy to navigate and the images are incredible.

Posted By Lindsy in October, 2023

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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

Never bought anything on this website before, but it probably won't be my last purchase. Definitely one of the easiest to use and most informative sites I've ever been to.

Posted By Bob in November, 2023

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Overall Rating -> 10

Great selection, I love your site! Great product visibility, information, etc.

Posted By John in February, 2024

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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 -> 10

Wonderful selection of gems to choose from. Have made many purchases and was only slightly disappointed once.

Posted By Teemo in February, 2024

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Overall Rating -> 9

My first purchase went well. I will purchase more gems in the future.

Posted By NoHalalAl in March, 2024

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Gemstones A-Z

Buy Round Shape 8 mm Gems

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

1.07 ct Oval Cut Color-Change Diaspore, 6.6 x 5.1 mm From Turkey

4.01 carat Oval Rhodolite Garnet, loose Certified Rhodolite Garnet from Tanzania, Natural Untreated Gems, 6.9 x 5.1 mm

1.65 ct Loose Orange Moonstone, 8 x 7.8 mm Trillion Cut From India

13.64 ct Oval Jasper, 23.2 x 17.2 mm From Indonesia

6.41 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 11.2 x 9 mm

46.25 ct Heart Hematite, 19.1 x 20.3 mm From Brazil

2.16 ct Loose Oval Malachite, 10.1 x 6.9 mm From Congo

1.38 carat Oval Opal, loose Certified Opal from Ethiopia, Natural Untreated Gem, 9.1 x 7 mm

0.14 ct White Diamond, 2.7 mm Diamond Cut From Brazil

0.83 carat Oval Opal, loose Certified Opal from Ethiopia, Natural Untreated Gem, 8.2 x 6.3 mm

7.44 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 15.1 x 11.2 mm

1.77 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 8 x 6.6 mm

6.76 ct Round Petal Cut Smoky Quartz, 11.5 mm From Brazil

1.03 ct Blue Kyanite, 7.1 x 5.1 mm Oval Cut From Nepal

9.72 ct Oval Pietersite, 17.6 x 11.2 mm From Namibia

0.8 carat London Blue Topaz, Square loose Topaz from Brazil, Natural Gem, 5 x 5 mm

0.97 carat Oval Opal, loose Certified Opal from Ethiopia, Natural Gem, 8 x 6.9 mm

3.16 ct Pink Morganite, 10 x 8.1 mm Oval Cut From Afghanistan

1.11 ct Oval Strawberry Quartz, 7.7 x 6 mm From Russia

4.47 ct Yellow Quartz, 10.3 x 10.2 mm Carved From Brazil

16.14 carat Pear Jasper, loose Certified Jasper from Indonesia, Natural Untreated Gems, 19.3 x 13.2 mm

3.41 carat Swiss Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7.2 x 5.2 mm

1.65 carat Pear Shape Kornerupine, loose Certified Kornerupine from Sri Lanka, Natural Untreated Gem, 9.2 x 5.8 mm

5.63 ct Odd Shaped Hemimorphite Druzy, 14.8 x 9.1 mm From Congo

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

1.43 carat Square Rhodolite Garnet, loose Certified Rhodolite Garnet from Mozambique, Natural Untreated Gems, 5.2 x 5.2 mm

1.43 carat Oval Opal, loose Certified Opal from Australia, Natural Untreated Gem, 10.9 x 8.2 mm

1.33 ct Loose Oval Cut Black Opal, 10.5 x 7.6 mm From Ethiopia

0.72 ct Loose Yellow Sapphire, 4.7 x 4.6 mm Cushion Cut From Tanzania

42.56 ct Oval Star Rose Quartz, 21.9 x 19 mm From South Africa

0.84 ct Oval Cut Peridot, 6 x 4 mm From China

Gemstone Information

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