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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Overall Rating -> 10

I love GemSelect, photos and details are great.

Posted By #1 in February, 2024

Source: Bizrate

Overall Rating -> 10

I have actually done business with them before and was quite satisfied with them then.My Mother collected turtle items and when I saw the Mother of Pearl turtle...I just thought of her and decided to buy it. It's even tinier than I thought, but so adorable!The gemstones I bought are for jewelry for my daughter's birthday.

Posted By Ktreva52 in February, 2024

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Overall Rating -> 10

Pleasant.

Posted By Mk in November, 2023

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Overall Rating -> 10

Selection and purchasing online was very easy

Posted By Aggy in January, 2024

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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 -> 9

An it was good.

Posted By Miguel in June, 2023

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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

I have started a small gem brokerage. I find stones to meet clients needs. Gemselect has helped me find what people what.

Posted By Pirates Bounty in April, 2024

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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

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Overall Rating -> 10

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

Posted By Skip in November, 2023

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Overall Rating -> 10

I have used Gem Select many times over the past 10 years and have always been happy with the product & services

Posted By Ordain in August, 2023

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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

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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

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 -> 10

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

Posted By Seastone 56 in October, 2023

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Gemstones A-Z

Buy 5 mm Gemstones

3.89 carat Marquise Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 12 x 6 mm

0.95 carat Orange Hessonite Garnet, Pear Shape loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.7 x 5.6 mm

4.93 carat White Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Gems, 6 mm

10.9 carat Swiss Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gem, 17 x 10.7 mm

0.6 carat Oval Demantoid Garnet, loose Certified Demantoid Garnet from Namibia, Natural Untreated Gem, 6 x 4.2 mm

1.18 carat Blue Tanzanite, Round loose Tanzanite from Tanzania, Natural Gems, 5.1 mm

13.23 ct Oval Serpentine, 24.2 x 15.2 mm From the United States

3.21 carat Pink Kunzite, Pear Shape loose Kunzite from Afghanistan, Natural Untreated Gem, 9.3 x 7.2 mm

23.93 ct Oval Obsidian, 32 x 20.8 mm From the United States

40.61 ct Oval Jasper, 32.3 x 23.9 mm From Indonesia

3.98 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 11.8 x 10 mm

7.13 ct Oval Star Ruby, 11.2 x 9.8 mm From Madagascar

0.62 ct Loose Yellow Sapphire, 5.9 x 4.1 mm Oval Cut From Tanzania

1.89 carat Pink Tourmaline, Round Cabochon loose Tourmaline from Mozambique, Natural Untreated Gem, 6.9 mm

0.04 ct Blue Diamond, 2.2 mm Diamond Cut From India

1.76 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6 x 4.2 mm

5.61 carat Blue Green Fluorite, Marquise Cut loose Fluorite from India, Natural Untreated Gem, 14.9 x 8 mm

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

5.69 carat Sky Blue Topaz, Heart loose Topaz from Brazil, Natural Gems, 9.2 x 9 mm

2.63 carat Trillion Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 9.9 x 9.8 mm

0.75 carat Blue Sapphire, Oval loose Sapphire from Sri Lanka, Natural Gem, 6.9 x 4.9 mm

0.85 ct Round Onyx, 6.7 mm From Sri Lanka

2 ct Round Checkerboard Smoky Quartz, 8.2 mm From Brazil

0.88 carat Oval Peridot, loose Certified Peridot from China, Natural Untreated Gem, 7.1 x 5.1 mm

1.36 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 6.4 x 5.2 mm

3.88 carat Red Malaya Garnet, Round loose Malaya Garnet from Tanzania, Natural Untreated Gems, 5.3 mm

3.51 ct Oval Tiger's Eye, 10.2 x 8.2 mm From Thailand

7.1 ct Oval Boulder Opal, 21.2 x 10.1 mm From Australia

8.96 ct Asscher Cut Rose Quartz, 10.5 x 10.4 mm From South Africa

1.19 ct Yellow Sphene, 7.9 x 5.7 mm Oval Cut From Sri Lanka

18.09 carat Green Opal, Oval loose Opal from Brazil, Natural Untreated Gem, 22.3 x 17.6 mm

4.47 ct Pink Morganite, 11.9 x 9.8 mm Oval Cut From Afghanistan

Gemstone Information

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