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 -> 9

Easy to use. Limited supply of higher quality gemstones.

Posted By Newfguy in February, 2024

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Overall Rating -> 10

Perfect size I was looking for and great price

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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 -> 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

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

I am of the opinion that the company gem select cares about the product beautiful gems it sells and the cost of the gem I purchased was small i was treated as if it cost a lot of money and product was described in detail and i felt good about the little stones i had ordered.

Posted By Sparkle in March, 2024

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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

was just windowshopping and spotted a couple "Very Uncommons", a tsavorite & a demantoid garnet that were both in a size I was looking for, & that I could very easily pay for -- so figured I would grab the tsavo ASAP and got the demantoid to accompany so they wouldn't be lonely.

Posted By Kittypie070 in April, 2024

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Overall Rating -> 10

Great Job today! No issues!

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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

Selection and purchasing online was very easy

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Overall Rating -> 9

Never bought anything on this website before, but it probably won't be my last purchase. Definitely one of the easiest to use and most informative sites I've ever been to.

Posted By Bob in November, 2023

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Overall Rating -> 10

Found what I was looking for

Posted By Rian in June, 2023

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Overall Rating -> 10

Gem Select has gems at afffordable prices.

Posted By George in March, 2024

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Overall Rating -> 10

This is only the second time I have ordered from GemSelect. I am a prolific gemstone collector and I wish I had found this site sooner!

Posted By Beachcomber in September, 2023

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Gemstones A-Z

Buy Square Shape 4x4 mm Gems

1.07 ct Purple Spinel, 6.6 x 6 mm Cushion Cut From Tanzania

8.84 carat Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 14.6 x 11.9 mm

5.83 carat Swiss Blue Topaz, Emerald-Cut loose Topaz from Brazil, Natural Gems, 9 x 7.1 mm

0.44 carat Yellow Sapphire, Heart loose from Tanzania, Natural Gem, 4.5 x 4.4 mm

6.3 carat Sky Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 9.9 x 8 mm

0.23 ct White Diamond, 3.1 mm Diamond Cut From Brazil

0.42 carat Orange Spessartite Garnet, Oval loose Spessartite Garnet from Mozambique, Natural Untreated Gem, 4.5 x 3.7 mm

1.16 ct Loose Orange Sapphire, 4.3 x 4.3 mm Cushion Cut From Tanzania

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

1.04 carat Oval Emerald, loose Certified Emerald from Colombia, Natural Gem, 6.8 x 5.9 mm

24.85 carat Pear Ruby-Zoisite, loose Certified Ruby-Zoisite from Tanzania, Natural Untreated Gem, 21.6 x 14.8 mm

0.8 carat Heart Tsavorite Garnet, loose Certified Tsavorite Garnet from Tanzania, Natural Untreated Gem, 7.5 x 5.4 mm

46.03 ct Round Jasper, 24.6 mm From Mexico

1.68 ct Green Sphene, 6.7 mm Round Cut From Sri Lanka

10.39 carat Bi-color Ametrine, Oval loose Ametrine from Brazil, Natural Untreated Gem, 16.5 x 12.7 mm

1.12 carat Oval Ruby, loose Certified Ruby from Myanmar, Natural Gem, 7 x 5.2 mm

7.28 ct Orange Moonstone, 14.7 x 14.5 mm Carved From India

0.41 ct Loose Yellow Sapphire, 4.3 mm Round Cut From Tanzania

21.64 carat Carved Turtle Mother of Pearl, loose Certified Mother of Pearl from China, Natural Gem, 20.5 x 17.6 mm

1.17 ct Yellow Morganite, 8 x 6.2 mm Oval Cut From Afghanistan

1.15 carat Oval Ruby, loose Certified Ruby from Myanmar, Natural Gem, 7.2 x 5.3 mm

0.52 carat Oval Emerald, loose Certified Emerald from Colombia, Natural Gem, 5.8 x 4.2 mm

25.42 ct Fancy Quartz With Marcasite, 44.7 x 11.4 mm From Brazil

2.79 ct Yellow Quartz, 9.5 x 9.3 mm Carved From Brazil

6.33 ct Yellow Quartz, 12.1 mm Round Concave Cut From Brazil

9.81 ct Fancy Rutile Quartz, 18.4 x 9.1 mm From India

33.6 ct Loose Round Labradorite, 25 mm From Madagascar

20.16 ct Yellow Quartz, 23.9 x 17.5 mm Carved From Brazil

0.75 carat Heart Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 6.2 x 6.1 mm

5.82 carat Trillion-Cut Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 10.1 x 10.1 mm

3.54 carat White Zircon, Diamond-Cut loose Zircon from Myanmar, Natural Gems, 6.6 mm

18.89 carat Pear Howlite, loose Certified Howlite from the United States, Natural Untreated Gem, 29.9 x 18.2 mm

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