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

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 -> 8

Many gems at reasonable pricing

Posted By Skittlebird in May, 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

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Overall Rating -> 10

I have used this site for sseveral years now. All has been great. I started collection gems from GemSelect for years and wanted to collect at least one of most stones. I loved Safers because the mols is a 9 + and they come in every color. This is the best place to buy gems for the assortment and price. Great place to learn about gems too. Sometimes the shipping is a little on the long side. But I would give them a 9.9 out of 10 !!

Posted By Steve in July, 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 -> 8

Very easy to find the specific stone I was looking for. I am pleased by both the selection and the price of the stones that are available. The only "bad" thing that I have to say is that the interface of the site is outdated.

Posted By Nick in March, 2024

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Overall Rating -> 10

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

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Overall Rating -> 10

The website design is a bit finicky for mobile, but Im sure its most likely just a mobile issue. Amazing selection of products, great prices.

Posted By Kuba in December, 2023

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Overall Rating -> 10

Excellent site.

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Overall Rating -> 10

It was easy to navigate and I hope that the gem is as nice as the picture

Posted By 1 in April, 2024

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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 -> 10

first time here sooooooooooo we will seeeee!!!!! so far so good!!!!!!

Posted By Seastone 56 in October, 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

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Gemstones A-Z

Buy Round Shape 8 mm Gems

4.42 carat Carved Leaf Ruby, loose Certified Ruby from Madagascar, Natural Gem, 14.7 x 11 mm

1.01 carat Orange Hessonite Garnet, Pear Shape loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 8 x 5.7 mm

3.37 ct Loose Princess Cut Sapphire, 2.8 x 2.8 mm From Tanzania

3.7 ct Diamond Cut Andalusite, 3.6 mm From Brazil

11.05 ct Black Star Sapphire, 14.7 x 12.3 mm Oval Cut From Thailand

0.97 carat Oval Opal, loose Certified Opal from Ethiopia, Natural Gem, 9.2 x 7.1 mm

1.18 ct Oval Cut Fire Opal, 8.9 x 7.3 mm From Mexico

1.4 ct Loose Purple Sapphire, 2.7 x 2.7 mm Octagon Cut From Tanzania

1.09 carat Green Tourmaline, Oval loose Tourmaline from Mozambique, Natural Untreated Gem, 6.3 x 5.3 mm

11.58 ct Oval Pietersite, 21.1 x 11.9 mm From Namibia

14.3 ct Round Cut Smoky Quartz, 16 mm From Brazil

1.47 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.6 x 6.2 mm

9.37 carat Pink Kunzite, Pear Shape loose Kunzite from Afghanistan, Natural Untreated Gem, 13.1 x 11.4 mm

4.82 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 14.9 x 10 mm

3.49 carat White Zircon, Diamond-Cut loose Zircon from Colombia, Natural Gems, 7 mm

40.17 ct Yellow Quartz, 25.2 x 19.6 mm Oval Cut From Brazil

1.69 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7.1 x 5.1 mm

2.11 carat Sky Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 6.9 x 5 mm

68.24 ct Pink Coral, 23.5 x 19.3 mm Carved From Taiwan

7.39 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 11 x 9 mm

4.54 ct Marquise Slice Ruby in Fuchsite, 18.7 x 9 mm From Ethiopia

2.1 ct Round Strawberry Quartz, 6.8 mm From Russia

1.24 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 15.7 x 3.7 mm

5.54 ct Pink Morganite, 13 x 10.2 mm Oval Cut From Afghanistan

2.97 carat Marquise Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 10.1 x 5.2 mm

2.87 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gem, 8.8 x 7.3 mm

0.41 ct Loose Pink Sapphire, 5.9 x 4 mm Oval Cut From Madagascar

2.22 ct Round Cut Peridot, 4.6 mm From China

13.09 ct Baguette Ruby-Zoisite, 17.3 x 11.2 mm From Tanzania

13.57 ct Oval Jasper, 24.4 x 17.4 mm From Indonesia

5.75 ct Loose Oval Malachite, 11.3 x 9 mm From Congo

6.9 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 10.8 x 8.9 mm

Gemstone Information

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