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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Overall Rating -> 10

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Overall Rating -> 10

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I really enjoy browsing through GemSelect. The selection is always marvelous and I love how detailed everything is described. The only thing I noticed is that when browsing through my phone, the videos of the gems do not load. If there were more videos of the gems, that would be amazing, though I understand that is a lot of work on GemSelect's part! Checking out is also very fast and easy, and I love that the return policy is very good, though I hope I don't have to use it anytime soon.

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Overall Rating -> 10

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Overall Rating -> 10

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Overall Rating -> 10

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Overall Rating -> 10

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Gemstones A-Z

Buy Trillion Shape 12x12 mm Gems

3.31 ct Loose Oval Star Ruby, 8.5 x 7.8 mm From Madagascar

11.85 carat Drilled-Ball Tiger's Eye, loose Certified Tiger's Eye from India, Natural Untreated Gem, 12.1 mm

12.5 carat Green Tourmaline, Carved Leaf loose Tourmaline from Mozambique, Natural Untreated Gem, 20.6 x 20.5 mm

15.06 ct Oval Howlite, 23.9 x 16.7 mm From the United States

1.25 ct Oval Cat's Eye Scapolite, 8.1 x 5.4 mm From Madagascar

3.59 carat Heart Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 8 x 8 mm

20.74 ct Oval Cat's Eye Opal, 20.6 x 16.8 mm From Brazil

2.88 carat Swiss Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 6.5 x 4.9 mm

6.36 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 14.5 x 9.8 mm

3.04 ct Yellow Beryl, 9.1 x 7 mm Oval Cut From Brazil

18.67 carat Round Checkerboard Amethyst, loose Certified from Brazil, Natural Untreated Gem, 18.2 mm

5.25 ct Yellow Quartz, 11.9 x 11.8 mm Octagon Concave Cut From Brazil

0.73 ct Loose White Sapphire, 4.5 mm Diamond Cut From Madagascar

8 ct Loose Oval Malachite, 13.4 x 10.2 mm From Congo

6.23 ct Fancy Fire Agate, 14.3 x 9.8 mm From Mexico

1.09 carat Orange Hessonite Garnet, Round loose Hessonite Garnet from Sri Lanka, Natural Untreated Gem, 5.8 mm

1.66 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7.1 x 5 mm

0.38 ct Loose Yellow Sapphire, 3.9 x 3.8 mm Cushion Cut From Madagascar

2.46 carat Orange Spessartite Garnet, Asscher loose Spessartite Garnet from Mozambique, Natural Untreated Gem, 7.4 x 7.3 mm

0.74 carat London Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gem, 7.1 x 5 mm

2.28 ct Round Cut Strawberry Quartz, 8.9 mm From Russia

7.75 carat Swiss Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gems, 14.8 x 6.8 mm

0.67 carat Blue Tanzanite, Marquise Cut loose Tanzanite from Tanzania, Natural Gems, 7.2 x 3.4 mm

1.94 ct Yellow Andesine Labradorite, 9.2 x 7 mm Oval Cut From Congo

5.15 ct Carved Prehnite, 16.3 x 10.7 mm From South Africa

7.77 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 16.2 x 12.9 mm

3.76 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gem, 12.2 x 10.1 mm

1.58 ct Oval Cut Kornerupine, 8.3 x 6.4 mm From Sri Lanka

0.18 ct White Diamond, 2.8 mm Diamond Cut From India

3.41 carat Swiss Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7.2 x 5.2 mm

0.53 ct Oval Chrysoberyl Cat's Eye, 4.7 x 3.9 mm From Sri Lanka

6.05 ct Fancy Fire Agate, 13.4 x 11.6 mm From Mexico

Gemstone Information

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