Calibrated 8 x 8 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 8 mm x 8 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

My first order. I am anxious to see if what I ordered is what I receive.

Posted By KRJ in July, 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 -> 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

Everything fine.

Posted By Hilario in December, 2023

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Overall Rating -> 10

Love gemselect

Posted By Joshua Howard in March, 2024

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Overall Rating -> 10

Fine. All emails answered. Excellent service. Nice discount added for orders. Briefly, a very good experience.

Posted By C.J. in February, 2024

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Overall Rating -> 8

purchased birthstones to be mounted into stud earrings as a gift for a friend's gift

Posted By MI photo in May, 2023

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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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Overall Rating -> 10

Very detailed and great pictures

Posted By Alexandrite in November, 2023

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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

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Overall Rating -> 10

it was good

Posted By Bobk in January, 2024

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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

this was very easy im exited to get my order

Posted By Mr. in April, 2024

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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

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Overall Rating -> 10

Fantastic dealer for quality gemstones. Website is easy to navigate, selection is superb, delivery of purchases is prompt. Easy to select incorrect payment options, however.

Posted By David W in May, 2023

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Gemstones A-Z

Buy Square Shape 8x8 mm Gems

0.57 carat Pink Morganite, Pear Shape loose Morganite from Afghanistan, Natural Untreated Gem, 8.2 x 4.5 mm

3.68 carat Yellow Citrine, Cushion loose Citrine from Brazil, Natural Untreated Gem, 11.2 x 8.1 mm

1.35 carat Yellow Citrine, Emerald-Cut loose Citrine from Brazil, Natural Untreated Gem, 7.8 x 5.8 mm

0.48 ct Loose Purple Sapphire, 6.4 x 4.8 mm Oval Cut From Tanzania

0.51 carat Pink Morganite, Pear Shape loose Morganite from Afghanistan, Natural Untreated Gem, 6.9 x 4.8 mm

2.49 carat White Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Gems, 6.4 mm

0.99 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 7.7 x 4.3 mm

0.17 carat Round Ruby, loose Certified Ruby from Myanmar, Natural Gem, 3.4 mm

2.47 carat Pear Shape Opal, loose Certified Opal from Australia, Natural Untreated Gem, 12.3 x 10.8 mm

9.63 carat Blue Aquamarine, Oval loose Aquamarine from Madagascar, Natural Untreated Gem, 16.2 x 11.6 mm

1.86 ct Orange Moonstone, 7 x 6.8 mm Square Cut From India

1.91 carat Oval Demantoid Garnet, loose Certified Demantoid Garnet from Namibia, Natural Untreated Gems, 4.6 x 3.7 mm

1.29 carat Blue Tanzanite, Pear Shape loose Tanzanite from Tanzania, Natural Gems, 4.8 x 3.8 mm

10.52 ct Carved Rose Quartz, 16.1 x 11.9 mm From Brazil

1.28 ct Oval Cut Peridot, 8 x 5.9 mm From China

2.63 carat Marquise Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 10.2 x 5.2 mm

30.18 ct Drilled Sphere Howlite, 12.8 mm From the United States

0.31 ct Orange Sphalerite, 3.9 mm Round Cut From Spain

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

27.1 ct Yellow Quartz, 19.2 x 19.2 mm Cushion Checkerboard From Brazil

2.33 ct Orange Sunstone, 6.1 x 4.2 mm Oval Cut From Russia

2.86 ct Round Cut Peridot, 4.8 mm From China

19.68 ct Oval Onyx, 25.1 x 18.1 mm From Sri Lanka

12.04 ct Oval Buff Top Chalcedony, 14 x 9.9 mm From Brazil

4.13 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 11.4 x 9.3 mm

0.58 ct Loose Purple Sapphire, 6.7 x 4.4 mm Oval Cut From Madagascar

0.69 carat Green Sapphire, Cushion loose Sapphire from Tanzania, Natural Gem, 4.6 x 4.5 mm

3.21 ct Yellow Apatite, 9.1 x 8.9 mm Asscher Cut From Madagascar

4.55 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 14.9 x 10 mm

1.14 ct Round Cat's Eye Moonstone, 6.1 mm From India

2.15 carat Pink Tourmaline, Round Cabochon loose Tourmaline from Mozambique, Natural Untreated Gems, 6.2 mm

2.06 carat Carved Leaf Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gem, 13.2 x 8.4 mm

Gemstone Information

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Gemstone EDUCATION

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