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 -> 10

Great selection of various gems, easy to navigate site

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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.

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Overall Rating -> 10

My last experience was good, in fact every experience I have had with them has met my expectations or surpassed them. These are really good people to work with.

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Overall Rating -> 10

The website is user friendly, has excellent selection. I've always found what I was looking for with Gem Select. When others don't have it they do. And most important, they have a way for you to pay without using PayPal. I cannot use PayPal they closed my account because of no cell phone.

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Overall Rating -> 10

Super easy to do business for great products.

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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

Easy to use. Limited supply of higher quality gemstones.

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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

Very large selection of items and we used the stones to have several pieces of jewelry made for us.

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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.

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Overall Rating -> 10

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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 -> 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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Gemstones A-Z

Buy Round Shape 8 mm Gems

6.46 carat Round Opal, loose Certified Opal from Ethiopia, Natural Untreated Gems, 7.9 mm

2.69 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gem, 9 x 6.1 mm

1 ct Blue Green Apatite, 7.3 x 5.4 mm Oval Cut From Madagascar

2.85 ct Oval Concave Cut Smoky Quartz, 14.1 x 7.1 mm From Brazil

1.32 ct Blue Apatite, 5.1 x 4.1 mm Oval Cut From Madagascar

3.22 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 4 x 4 mm

0.36 carat Pear Shape Emerald, loose Certified Emerald from Colombia, Natural Gem, 5.8 x 3.8 mm

0.59 ct Loose Purple Sapphire, 6 x 4.1 mm Octagon Cut From Tanzania

1.55 ct Loose White Sapphire, 4.4 mm Diamond Cut From Madagascar

2.03 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 8.5 x 7.1 mm

1.1 carat Pink Morganite, Pear Shape loose Morganite from Afghanistan, Natural Untreated Gem, 9.6 x 5.2 mm

1.75 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6.2 x 4.3 mm

2.14 carat Swiss Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 6 x 4.1 mm

0.24 carat Orange Spessartite Garnet, Oval loose Spessartite Garnet from Mozambique, Natural Untreated Gem, 4.1 x 3 mm

0.22 ct Oval Cut Kornerupine, 4.2 x 3.3 mm From Sri Lanka

0.97 carat Orange Spessartite Garnet, Oval loose Spessartite Garnet from Mozambique, Natural Untreated Gem, 6.3 x 4.8 mm

5.62 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 9.9 x 8 mm

4.1 carat Yellow Citrine, Emerald Cut loose Citrine from Brazil, Natural Untreated Gem, 11.1 x 9.1 mm

1.57 carat Purple Tourmaline, Oval loose Tourmaline from Mozambique, Natural Untreated Gem, 8.1 x 6.2 mm

1.54 ct Purple Spinel, 6.6 x 6.2 mm Cushion Cut From Tanzania

2.22 carat Yellow Citrine, Square loose Citrine from Brazil, Natural Untreated Gems, 6.2 x 6.1 mm

1.24 ct Violet Spinel, 6.5 x 6.2 mm Cushion Cut From Tanzania

16.79 carat Swiss Blue Topaz, Carved Fruit loose Topaz from Brazil, Natural Gem, 23.5 x 12.5 mm

1.18 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gems, 7.1 x 5 mm

2.09 carat White Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Gems, 5.7 mm

34.29 ct Oval Jasper, 27.3 x 18.4 mm From Mexico

2.5 ct Orange Sunstone, 8.1 x 6 mm Oval Cut From India

2.64 ct Blue Green Grandidierite, 10.9 x 8 mm Oval Cut From Madagascar

0.08 ct Green Diamond, 2.7 mm Diamond Cut From India

2.79 carat Emerald Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 6 x 3.9 mm

3.33 carat Yellow Citrine, Emerald Cut loose Citrine from Brazil, Natural Untreated Gems, 8.1 x 6.1 mm

1.5 carat Oval Opal, loose Certified Opal from Australia, Natural Untreated Gem, 10.4 x 7.4 mm

Gemstone Information

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