Calibrated 12 x 12 mm Trillion Shape Loose Natural Gemstones from ...

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 Trillion 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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Gemstones A-Z

Buy Trillion Shape 12x12 mm Gems

1.76 ct Orange Moonstone, 6.2 x 5.9 mm Trillion Cut From India

0.52 ct Round Chrysoberyl Cat's Eye, 4.3 mm From Sri Lanka

3.13 ct Blue Star Sapphire, 8.9 x 7 mm Oval Cut From Thailand

0.56 ct Loose Yellow Sapphire, 4.4 x 4.4 mm Cushion Cut From Tanzania

77.47 ct Trillion Chrysocolla, 40.9 x 36.1 mm From Australia

4.68 ct Yellow Agate, 12.3 x 9.9 mm Oval Cut From India

6.02 ct Loose Baguette Tiger's Eye, 12 x 10 mm From Thailand

14.44 ct Purple Kunzite, 13 x 12.4 mm Cushion Cut From Afghanistan

7.67 carat Yellow Citrine, Emerald Cut loose Citrine from Brazil, Natural Untreated Gem, 14 x 10.1 mm

2.31 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gems, 6.9 x 5 mm

3.47 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gems, 8.9 x 7.1 mm

3.99 ct Round Tiger's Eye, 8.1 mm From Thailand

1.63 ct Yellow Apatite, 7.1 x 6.9 mm Asscher Cut From Madagascar

10.76 ct Loose Pear Dendritic Agate, 20.1 x 15.2 mm From India

1 carat Oval Demantoid Garnet, loose Certified Demantoid Garnet from Namibia, Natural Untreated Gems, 4.8 x 3.9 mm

0.73 carat Pear Shape Emerald, loose Certified Emerald from Colombia, Natural Gem, 7.3 x 4.9 mm

8.41 carat Swiss Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gems, 13.8 x 8.1 mm

10.77 ct Round Rutile Quartz, 11 mm From India

2.74 ct Oval Checkerboard Smoky Quartz, 9.5 x 7.5 mm From Brazil

21.71 ct Baguette Maw-Sit-Sit, 17.8 x 11 mm From Myanmar

4.79 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 7.2 x 5.2 mm

0.8 ct Octagon Cut Color-Change Diaspore, 5.4 x 5.2 mm From Brazil

4.44 carat Pear Shape Opal, loose Certified Opal from Australia, Natural Untreated Gem, 12.7 x 12.7 mm

1.74 ct Loose Orange Sapphire, 4.8 x 2.6 mm Marquise Cut From Tanzania

10.97 ct Yellow Andesine Labradorite, 16.1 x 11.7 mm Oval Cut From Congo

2.19 ct Round Onyx, 5.5 mm From Sri Lanka

1.64 ct Loose White Sapphire, 4.4 mm Diamond Cut From Madagascar

0.51 carat Oval Emerald, loose Certified Emerald from Colombia, Natural Gem, 6.2 x 4.2 mm

2 ct Oval Cut Golden Beryl, 10.2 x 7.7 mm From Madagascar

4.4 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 13.2 x 9.7 mm

7.65 carat Pink Topaz, Cushion loose Topaz from Brazil, Natural Gems, 10.2 x 8.1 mm

12.3 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 14 x 10 mm

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