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

Very excited and impressed with all your products. Keep up the good work....more different stones to choose from. I like Cabachons.

Posted By Meow in June, 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

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Overall Rating -> 10

Trustworthy site. I've had several good experiences with company. Products always have met my expectations. Thank you.

Posted By Ray in February, 2024

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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

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Overall Rating -> 10

I searched for the item by description and millimeter and had my choice come up and then made the best selection.

Posted By Tim in April, 2024

Source: Bizrate

Overall Rating -> 10

Always have good experience

Posted By Ginnie in September, 2023

Source: Bizrate

Overall Rating -> 10

Purchasing from Gem Select was a pleasant and easy experience. The photos of the stones I was interested in were an accurate depiction of the stones I received. Ordering was easy and the items arrived within a week. Over all it was a very positive experience.

Posted By Dee in September, 2023

Source: Bizrate

Overall Rating -> 10

Great Job today! No issues!

Posted By Samlovesgems777 in August, 2023

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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

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Overall Rating -> 10

Purchased for my granddaughter she was very pleased with it.

Posted By Charlie in April, 2024

Source: Bizrate

Overall Rating -> 10

Easy to use.

Posted By Hope in March, 2024

Source: Bizrate

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

Source: Bizrate

Overall Rating -> 10

Very good customer service. I had an issue on my end with shipping and I received a response the next day!

Posted By Orphanboy in December, 2023

Source: Bizrate

Overall Rating -> 10

Gem Select has gems at afffordable prices.

Posted By George in March, 2024

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Overall Rating -> 10

Excellent experience!

Posted By Steph in April, 2023

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Gemstones A-Z

Buy Square Shape 4x4 mm Gems

4.25 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 5.1 x 3 mm

0.38 ct Oval Cut Chrysoberyl Cat's Eye, 3.4 x 3.2 mm From Sri Lanka

2.36 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Sri Lanka, Natural Untreated Gem, 9.6 x 7.6 mm

1.99 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Sri Lanka, Natural Untreated Gem, 8.4 x 6.1 mm

7.1 ct Pink Morganite, 18.2 x 11.7 mm Carved From Afghanistan

5.05 ct Round Labradorite, 10.3 mm From Madagascar

1.68 ct Green Sphene, 7.6 x 6.3 mm Oval Cut From Sri Lanka

1.91 ct Orange Sunstone, 8.8 mm Round Cut From India

31.4 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 32.9 x 26.6 mm

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

0.4 ct Loose Pink Sapphire, 5.3 x 2.8 mm Marquise Cut From Tanzania

2.86 carat Emerald Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 5.9 x 3.9 mm

0.52 ct Loose White Sapphire, 5.3 x 4 mm Oval Cut From Tanzania

0.9 ct Octagon Cut Color-Change Diaspore, 7 x 4.4 mm From Turkey

1.08 carat Heart Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 5.1 x 5.1 mm

9.58 ct Octagon Cut Rose Quartz, 12.2 x 12 mm From South Africa

9.98 ct Oval Cut Strawberry Quartz, 15.4 x 12.7 mm From Russia

0.94 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 14.6 x 3.2 mm

1.48 ct Blue Kyanite, 8.1 x 5.9 mm Oval Cut From Nepal

3.54 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 9.1 x 7 mm

1.26 ct Oval Sillimanite Cat's Eye, 7.5 x 4.9 mm From Madagascar

9.43 carat Blue Aquamarine, Oval loose Aquamarine from Madagascar, Natural Untreated Gem, 16.9 x 13.5 mm

30.18 ct Oval Jasper, 32 x 23.2 mm From Indonesia

2.78 ct Yellow Beryl, 10.8 x 8.8 mm Oval Cut From Brazil

0.95 carat Yellow Morganite, Pear Shape loose Morganite from Afghanistan, Natural Untreated Gem, 8.3 x 6.1 mm

1.38 ct Pink Morganite, 7.1 mm Round Cut From Afghanistan

1.75 ct Yellow Beryl, 9.1 x 6.9 mm Oval Cut From Madagascar

1.89 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 8.9 x 7.1 mm

1.07 carat Oval Opal, loose Certified Opal from Ethiopia, Natural Gems, 7.1 x 5.1 mm

2.76 ct Round Cat's Eye Scapolite, 8.8 mm From Madagascar

14.16 ct Gray Jadeite, 20.1 x 13.1 mm Oval Cut From Myanmar

8.81 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6.2 x 4.2 mm

Gemstone Information

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