Calibrated 8 x 8 mm Square Shape Loose Natural Gemstones from GemS...

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 Square shapes, facet cut and cabochon gems available now in 8 mm x 8 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 meant nor 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

Love gemselect

Posted By Joshua Howard in March, 2024

Source: Bizrate

Overall Rating -> 7

I placed order#384714 based on the picture on your website and the stone came in much darker. I'm sure it's the same stone i ordered but your lighting made it seem a lighter blue. I was trying to match a stone for a customer and based on the picture it would have been close enough but the stone in person is a mile off.

Posted By Bobk in February, 2024

Source: Bizrate

Overall Rating -> 8

Found on a search engine. Scanned inventory and made a small purchase.

Posted By Ralli in August, 2023

Source: Bizrate

Overall Rating -> 10

I really enjoy browsing through GemSelect. The selection is always marvelous and I love how detailed everything is described. The only thing I noticed is that when browsing through my phone, the videos of the gems do not load. If there were more videos of the gems, that would be amazing, though I understand that is a lot of work on GemSelect's part! Checking out is also very fast and easy, and I love that the return policy is very good, though I hope I don't have to use it anytime soon.

Posted By ChiChi in January, 2024

Source: Bizrate

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

Source: Bizrate

Overall Rating -> 9

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

Posted By NoHalalAl in March, 2024

Source: Bizrate

Overall Rating -> 10

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

Posted By Skip in November, 2023

Source: Bizrate

Overall Rating -> 10

Easy to use.

Posted By Hope in March, 2024

Source: Bizrate

Overall Rating -> 10

I have received emails for about a year and today is the condition that had me decide on the purchase

Posted By Tim in April, 2024

Source: Bizrate

Overall Rating -> 9

Easy to use. Limited supply of higher quality gemstones.

Posted By Newfguy in February, 2024

Source: Bizrate

Overall Rating -> 10

The website is well organized and works fast forward and back. Plenty of filters. Each gem is described in detail and you receive the one pictured. Gem material info and sources available. I would like to see more specifics on sources besides country- at least region or state and in the US with Turquiose which mine. Thanks!

Posted By Orchidisle in February, 2024

Source: Bizrate

Overall Rating -> 10

It was easy to search and find what i wanted

Posted By Gunner in November, 2023

Source: Bizrate

Overall Rating -> 10

I particularly like information about product provided with purchase.

Posted By Dick in May, 2023

Source: Bizrate

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

Source: Bizrate

Overall Rating -> 10

The site was easy to shop and the payment was secure. I’m looking forward to receiving my order!

Posted By JAB93 in June, 2023

Source: Bizrate

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Gemstones A-Z

Buy Square Shape 8x8 mm Gems

1.64 carat Oval Peridot, loose Certified from China, Natural Untreated Gems, 7 x 4.9 mm

6.09 carat Black Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 11.4 x 8 mm

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

28.25 ct Oval Fossil Coral, 20.8 x 13.5 mm From Indonesia

46.73 ct Fancy Charoite, 31 x 25 mm From Russia

5.89 ct Oval Cat's Eye Opal, 14.2 x 11.9 mm From Madagascar

1.59 carat Orange Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Untreated Gem, 6.5 mm

1.72 carat Swiss Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 8 x 6 mm

4.59 carat Blue Sapphire, Pear Shape loose Sapphire from Sri Lanka, Natural Gem, 11.8 x 8.3 mm

0.32 ct Baguette Cut Iolite, 5.1 x 2.9 mm From Madagascar

9.29 ct Baguette Tiger's Eye, 15.9 x 12 mm From Thailand

2.85 carat Pear Shape Opal, loose Certified Opal from Australia, Natural Untreated Gem, 12.3 x 11.2 mm

2.87 ct Loose Baguette Labradorite, 9.1 x 6.8 mm From Madagascar

76.12 carat Pear Jasper, loose Certified Jasper from Indonesia, Natural Untreated Gem, 41.4 x 34.5 mm

57.97 ct Round Checkerboard Labradorite, 31.7 mm From Madagascar

1.62 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gem, 9.9 x 7 mm

41.84 carat Pear Rutile Quartz, loose Certified Rutile Quartz from India, Natural Untreated Gem, 32.4 x 18.3 mm

2.27 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 7 x 5 mm

1.73 carat Pear Shape Opal, loose Certified Opal from Ethiopia, Natural Untreated Gem, 11.9 x 8.1 mm

3.48 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7 x 5.2 mm

3.02 ct Oval Cut Golden Beryl, 9.2 x 6.7 mm From Madagascar

10.91 ct Carved Rose Quartz, 17.9 x 17.8 mm From Brazil

0.6 carat Round Ruby, loose Certified Ruby from Myanmar, Natural Gem, 4.6 mm

1.81 carat Swiss Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 8.2 x 6.2 mm

8.45 carat Swiss Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gems, 13.9 x 7.8 mm

0.4 ct Loose Violet Sapphire, 5.1 x 4.1 mm Oval Cut From Tanzania

21.47 ct Yellow Star Sapphire, 16.6 x 13.8 mm Oval Cut From Madagascar

1.54 ct Loose Oval Cut Black Opal, 10.2 x 8 mm From Ethiopia

11.91 ct Yellow Quartz, 15.4 x 15 mm Flower Cut From Brazil

0.99 ct Oval Sillimanite Cat's Eye, 6 x 5.7 mm From Madagascar

3.59 ct Round Labradorite, 7.2 mm From Madagascar

33.81 ct Oval Howlite, 31 x 22.9 mm From the United States

Gemstone Information

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Gemstone EDUCATION

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