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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Gemstones A-Z

Buy Square Shape 8x8 mm Gems

7.69 ct Round Cut Smoky Quartz, 12.9 mm From Brazil

1.25 ct Oval Cut Fire Opal, 9.4 x 6.8 mm From Mexico

0.7 ct Oval Checkerboard Peridot, 6.1 x 4.1 mm From China

5.4 ct Asscher Cut Smoky Quartz, 10.4 x 10.4 mm From Brazil

1.04 carat Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 7.2 x 5.2 mm

5.78 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gem, 18.2 x 9.8 mm

1.27 carat Blue Tanzanite, Pear Shape loose Tanzanite from Tanzania, Natural Gems, 5 x 3.9 mm

2.33 carat Trillion Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 9.1 x 8.9 mm

7.48 ct Round Rutile Quartz, 10.2 mm From India

72.36 ct Fancy Tiger's Eye Matrix, 41.1 x 23.6 mm From Mexico

3.23 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Madagascar, Natural Untreated Gems, 6 x 5.9 mm

1.91 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 15.1 x 3.9 mm

6.88 carat White Topaz, Round loose Topaz from Brazil, Natural Untreated Gems, 8.9 mm

1.55 carat Green Sapphire, Princess-Cut loose Sapphire from Tanzania, Natural Gems, 3 x 3 mm

1 ct Yellow Beryl, 6.9 mm Round Cut From Madagascar

11.72 ct Yellow Quartz, 16 x 16.2 mm Carved From Brazil

15.73 ct Yellow Quartz, 21.5 x 17 mm Carved From Brazil

3.06 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gem, 8.4 x 6.3 mm

14.93 ct Yellow Apatite, 16.2 x 13.4 mm Oval Cut From Madagascar

0.64 ct Loose Yellow Sapphire, 5.7 x 4.8 mm Oval Cut From Tanzania

0.99 ct Cushion Cut Peridot, 7.8 x 5.6 mm From China

5.57 ct Multicolor Opal Doublet, 18.4 x 7.3 mm Odd Shaped From Australia

62.15 carat Pear Hematite, loose Certified Hematite from Brazil, Natural Untreated Gems, 24.3 x 17.1 mm

0.36 carat Pink Morganite, Pear Shape loose Morganite from Afghanistan, Natural Untreated Gem, 6.1 x 4 mm

5.14 ct Carved Prehnite, 13.6 x 9.5 mm From South Africa

0.7 ct Oval Cut Peridot, 6.9 x 5 mm From China

20.34 ct Fancy Dendritic Agate, 28.1 x 15.1 mm From India

2.96 carat White Topaz, Cushion loose Topaz from Brazil, Natural Untreated Gems, 4.6 x 4.5 mm

1.28 carat Blue Tanzanite, Pear Shape loose Tanzanite from Tanzania, Natural Gems, 5 x 3.2 mm

18.57 carat Ammolite, loose Certified Ammolite from Canada, Natural Gem, 24 x 16.6 mm

1.06 ct Blue Kyanite, 6 mm Round Cut From Nepal

5.21 ct Orange Moonstone, 10.2 mm Round Cut From India

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