Calibrated 5 mm Natural Loose Gemstones in all shapes: GemSelect

Buy gems by size in millimeters. Some people by gems by color or prize, 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 sizes and shapes, facet cut and cabochon gems available now in the 5 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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Gemstone Information

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Overall Rating -> 10

Great selection

Posted By GHS40 in December, 2023

Source: Bizrate

Overall Rating -> 10

Interested in unusual stones and found many that I purchased or will purchase in the near future. I have been a customer of gem select for almost ten years and have always been pleased with buying experience and the delivered product

Posted By Fairhope Pete in December, 2023

Source: Bizrate

Overall Rating -> 10

Everything was fine.

Posted By Matt in March, 2024

Source: Bizrate

Overall Rating -> 10

The website is easy to search, the variety of gems is excellent and the educational information is interesting and helpful! Love browsing and shopping the GemSelect website!

Posted By Happiness in January, 2024

Source: Bizrate

Overall Rating -> 10

I loved the opportunity to shop on a website that I could trust 👍

Posted By Will J. Lover in September, 2023

Source: Bizrate

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

Source: Bizrate

Overall Rating -> 9

Not easy enough to buy by exact size, and many stones aren't carbechon curved shape on top

Posted By Erick in July, 2023

Source: Bizrate

Overall Rating -> 10

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

Posted By Seastone 56 in October, 2023

Source: Bizrate

Overall Rating -> 10

Very easy. I have purchased a few times before and was satisfied each time. Thank you.

Posted By Ray in December, 2023

Source: Bizrate

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

Source: Bizrate

Overall Rating -> 9

GemSelect has a fantastic assortment of Semi-precious stones. I have not found any other web site with the variety you have.

Posted By RobDill in August, 2023

Source: Bizrate

Overall Rating -> 9

over the experience was similar to other sites i have used. The only real note I have is the checkout experience was tedious and discriminatory, i wouldn't accept visa gift cards, which not only have guaranteed funds but help protect from misuse of personal information, but would not accept my visa b/c it is a prepaid card. I don't have bank account and I have been using the prepaid card for years without issue so this was disappointing to me. I feel safer using reputable gem sites rather than amazon or ebay (I have been sold fake gems with fake certs on both), but not being able to use my own valid legitimate funds and having to find a friend to buy for me b/c I use a non-bank card like 40% of the country is insulting.

Posted By Iggywiggly in January, 2024

Source: Bizrate

Overall Rating -> 10

Pleasant.

Posted By Mk in November, 2023

Source: Bizrate

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

I was pleased with the selection of gems, the ease of navigating, and the smooth checkout

Posted By JamesMichael781 in September, 2023

Source: Bizrate

Gemstones A-Z

Buy 5 mm Gemstones

12.22 ct Round Pietersite, 18.9 mm From Namibia

7.61 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 11.2 x 9.1 mm

4.82 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 14.9 x 10.2 mm

20.86 carat Pear Labradorite, loose Certified Labradorite from Madagascar, Natural Untreated Gems, 16.2 x 11.9 mm

2.73 carat White Topaz, Cushion loose Topaz from Brazil, Natural Untreated Gems, 4.6 x 4.5 mm

1.01 ct Loose Pink Tourmaline, 6.3 mm Round Cabochon From Mozambique

1.44 ct Oval Cut Golden Beryl, 8.7 x 6.8 mm From Madagascar

5.34 ct Oval Black Opal, 15.7 x 11.6 mm From Ethiopia

7.47 ct Oval Quartz Cat's Eye, 12.3 x 10.4 mm From Sri Lanka

2.89 carat Trillion Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 10 x 9.8 mm

9.74 ct Fancy Fire Agate, 18.5 x 10.7 mm From Mexico

2.8 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 7.1 x 5.1 mm

25.35 ct Oval Cut Rose Quartz, 21.6 x 18.8 mm From South Africa

1.46 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 7 x 4.9 mm

14.77 carat Pear Checkerboard Labradorite, loose Certified Labradorite from Madagascar, Natural Untreated Gems, 18.1 x 13 mm

6.37 ct Yellow Quartz, 12 x 11.8 mm Carved From Brazil

8.71 ct Loose Pink Kunzite, 12.1 x 9.7 mm Octagon Cut From Afghanistan

0.39 carat Oval Emerald, loose Certified Emerald from Colombia, Natural Gem, 5.1 x 4.3 mm

0.82 ct Loose Purple Sapphire, 5.2 x 4.1 mm Oval Cut From Madagascar

3.98 carat Black Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 10.9 x 7.1 mm

4.03 ct Loose Oval Star Ruby, 9.6 x 7.8 mm From Madagascar

7.34 ct Oval Quartz With Marcasite, 16.2 x 11.4 mm From Brazil

4.97 carat Barrel Cut Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 9.1 x 4.6 mm

30.47 ct Oval Obsidian, 33.2 x 21.6 mm From the United States

3.59 carat Red Zircon, Oval loose Zircon from Tanzania, Natural Untreated Gem, 9.7 x 7.3 mm

8.41 ct Heart Onyx, 10.1 x 10 mm From Sri Lanka

5.02 ct Pink Morganite, 14 x 10.1 mm Oval Cut From Afghanistan

4.26 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 11.9 x 10 mm

0.72 ct Orange Sphalerite, 5.5 x 4.7 mm Oval Cut From Spain

9.99 carat Pear Tsavorite Garnet, loose Certified Tsavorite Garnet from Tanzania, Natural Untreated Gem, 17.9 x 13.6 mm

1.33 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gems, 7.1 x 5.1 mm

10.19 ct Round Rutile Quartz, 12.9 mm From India

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