Calibrated 12 x 12 mm Square Shape Loose Natural Gemstones from Ge...

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 12 mm x 12 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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I placed order#384714 based on the picture on your website and the stone came in much darker. I'm sure it's the same stone i ordered but your lighting made it seem a lighter blue. I was trying to match a stone for a customer and based on the picture it would have been close enough but the stone in person is a mile off.

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

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Gemstones A-Z

Buy Square Shape 12x12 mm Gems

3.95 ct Yellow Quartz, 11.7 x 9.9 mm Oval Concave Cut From Brazil

39.45 carat Pear Jasper, loose Certified Jasper from Indonesia, Natural Untreated Gem, 33.7 x 30.4 mm

2.31 ct Oval Cut Golden Beryl, 8.1 x 6.1 mm From Madagascar

13.27 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 14.7 x 12.6 mm

3.97 carat Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 10.2 x 10.1 mm

6.78 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 15.9 x 11.9 mm

0.96 carat Orange Hessonite Garnet, Round loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 5.6 mm

7.33 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 10.7 x 8.7 mm

0.56 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gem, 7 x 5.1 mm

3.97 ct Oval Prehnite, 8.1 x 6.9 mm From South Africa

3.7 ct Oval Prehnite, 7.8 x 6.7 mm From South Africa

1.56 carat Pear Shape Opal, loose Certified Opal from Ethiopia, Natural Untreated Gem, 11.9 x 7.9 mm

4.96 ct Green Agate, 18.2 x 9.5 mm Carved From India

1.89 carat Oval Opal, loose Certified Opal from Australia, Natural Untreated Gem, 10.4 x 8.2 mm

32.77 ct Brown Moonstone, 21.7 x 16.4 mm Oval Cut From India

1.63 carat Oval Emerald, loose Certified Emerald from Colombia, Natural Gems, 6.3 x 5.1 mm

25.83 ct Oval Jasper, 20.1 x 15.1 mm From Indonesia

0.5 ct Loose Purple Sapphire, 5.6 x 4.1 mm Oval Cut From Madagascar

3.58 ct Diamond Cut Andalusite, 3.6 mm From Brazil

4.17 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gems, 8.1 x 5.2 mm

2.28 carat Blue Tanzanite, Pear Shape loose Tanzanite from Tanzania, Natural Gems, 5.9 x 3.9 mm

0.94 carat Pear Shape Peridot, loose Certified Peridot from China, Natural Untreated Gems, 6.1 x 4.1 mm

1.46 carat Orange Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Untreated Gem, 6.4 mm

4.22 ct Oval Onyx, 13.1 x 11 mm From Sri Lanka

7.22 ct Round Rutile Quartz, 13.1 mm From India

2.44 ct Round Cut Peridot, 4.6 mm From China

5.8 ct Fancy Fire Agate, 13.4 x 9.8 mm From Mexico

2.78 carat Emerald-Cut Amethyst for Sale, loose Certified Amethyst from Brazil, Natural Untreated Gems, 8.1 x 6 mm

0.68 ct Green Sphene, 5 x 4.7 mm Cushion Cut From Sri Lanka

0.7 carat Pear Shape Opal, loose Certified Opal from Ethiopia, Natural Gem, 7.9 x 6.6 mm

1.47 ct Loose Orange Moonstone, 10.2 x 5.4 mm Marquise Cut From India

4.49 carat Sky Blue Topaz, Heart loose Topaz from Brazil, Natural Gems, 4 x 3.9 mm

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