Calibrated 4 x 4 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 4 mm x 4 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

blessed be the lord blessed be the saved blessed be the work blessed be the traveled i write down my good times in these stones and when times are gray i can still se the sunny days refract in these stones

Posted By Kickbass.2 in May, 2023

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Overall Rating -> 10

it was good

Posted By Bobk in January, 2024

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Overall Rating -> 10

Very pleased with shopping on this site. It's easy to navigate and information about gemstones is very good.

Posted By Kate in December, 2023

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Overall Rating -> 9

So many gorgeous stones! The only "complaint" I have is it's difficult to visualize sizes in mm. Perhaps some way to compare in inches?It has been a long time since I bought stones from Gem select, but the process wasn't too difficult.

Posted By Ktreva52 in February, 2024

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Overall Rating -> 9

Easy to use. Limited supply of higher quality gemstones.

Posted By Newfguy in February, 2024

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Overall Rating -> 9

It went well

Posted By Rob in December, 2023

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Overall Rating -> 10

Great site

Posted By Lord of Bananas in November, 2023

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Overall Rating -> 10

Easy to find the stones I was looking for. Always good quality stones

Posted By Erin in June, 2023

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Overall Rating -> 10

I have used gm select a while ago and was always pleased with the products

Posted By Jaytee in November, 2023

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Overall Rating -> 10

I was looking for a source for affordable genuine gemstones for my grandson who is currently very interested in rocks and gems. I was quite surprised and pleased to find GemSelect and finding the right stones at the right price couldn't have been simpler.

Posted By Papa in December, 2023

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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.

Posted By NJD in September, 2023

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Overall Rating -> 10

Always an easy experience using Gem select.

Posted By Jeff in November, 2023

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Overall Rating -> 10

My only complaint is that there are so many beautiful and affordable stones that I get distracted from what I planned to order.

Posted By Phoenix in March, 2024

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Overall Rating -> 10

I find the website user friendly.

Posted By Becky in August, 2023

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Overall Rating -> 10

I particularly like information about product provided with purchase.

Posted By Dick in May, 2023

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Gemstones A-Z

Buy Square Shape 4x4 mm Gems

1.66 carat Swiss Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 8.2 x 6.1 mm

21.97 carat Swiss Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 19.7 x 15 mm

3.21 ct Blue Star Sapphire, 7.3 x 5.3 mm Oval Cut From Thailand

4.5 ct Fancy Fire Agate, 12.2 x 9 mm From Mexico

3.83 ct Yellow Quartz, 12.1 x 12 mm Carved From Brazil

1.45 carat White Zircon, Emerald Cut loose Zircon from Myanmar, Natural Gem, 7.3 x 5 mm

2.09 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Sri Lanka, Natural Untreated Gem, 8.5 x 7 mm

0.86 ct Oval Cut Peridot, 7 x 5.1 mm From China

1.16 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 20.7 x 2.7 mm

0.84 ct Loose Pink Sapphire, 6.5 x 4.9 mm Oval Cut From Madagascar

2.39 carat Blue Sapphire, Briolette with Hole loose Sapphire from Sri Lanka, Natural Gems, 5.2 mm

2.27 carat Yellow Citrine, Trillion loose Citrine from Brazil, Natural Untreated Gem, 9.2 x 9.1 mm

19.54 ct Yellow Quartz, 19.2 x 15.2 mm Carved From Brazil

4.86 carat Carved Round Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 11.4 mm

1.54 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 6.9 x 5 mm

3.6 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7 x 5 mm

6.3 carat Black Tourmaline, Round loose Tourmaline from Mozambique, Natural Untreated Gem, 11.8 mm

1.7 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 6.9 x 5.1 mm

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

8.99 ct Oval Cat's Eye Opal, 14.9 x 10.7 mm From Madagascar

0.43 ct Loose Orange Sapphire, 5.3 x 3.9 mm Oval Cut From Tanzania

0.69 carat Oval Emerald, loose Certified Emerald from Colombia, Natural Gem, 6.8 x 5.1 mm

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

2.84 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 12.9 x 8.9 mm

30.58 ct Oval Fossil Coral, 23.1 x 13.6 mm From Indonesia

5.34 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 9.9 x 7.9 mm

16.64 ct Pink Coral, 15.3 x 10.7 mm Carved From Taiwan

0.86 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 4.1 x 4.1 mm

0.1 ct Oval Chrysoberyl Cat's Eye, 3.1 x 2.4 mm From Sri Lanka

3.95 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 6 x 4.1 mm

3.26 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 10.9 x 8.9 mm

22.87 ct Heart Hematite, 20.4 x 19.1 mm From Brazil

Gemstone Information

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