Calibrated Trillion Cut Gemstones in Size 15x15 mm

Some people by gems by color or prize, 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 15 mm x 15 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 15x15 mm Gems

3.73 ct Green Agate, 19.3 x 9.6 mm Carved From India

3.66 ct Round Checkerboard Smoky Quartz, 8 mm From Brazil

3.71 ct Oval Tiger's Eye, 12.2 x 8.2 mm From Thailand

2.08 carat Orange Hessonite Garnet, Cushion loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 8.1 x 6.1 mm

1.83 carat Pink Tourmaline, Round Cabochon loose Tourmaline from Mozambique, Natural Untreated Gem, 7.1 mm

3.83 ct Loose Oval Star Ruby, 9 x 7.5 mm From Madagascar

2.61 carat Pear Rutile Quartz, loose Certified Rutile Quartz from India, Natural Untreated Gem, 10.8 x 7.1 mm

6.7 carat Orange Zircon, Round loose Zircon from Sri Lanka, Natural Untreated Gems, 4.6 mm

0.59 ct Loose Yellow Sapphire, 6 x 4 mm Oval Cut From Tanzania

8.9 ct Octagon Cut Smoky Quartz, 12.5 x 12.5 mm From Brazil

18.1 ct Loose Pear Cut Amethyst, 21 x 15.9 mm From Brazil

1.12 ct Oval Sillimanite Cat's Eye, 7.2 x 4.7 mm From Madagascar

8.99 carat Sky Blue Topaz, Carved Leaf loose Topaz from Brazil, Natural Gem, 15.9 x 9.9 mm

1.3 ct Orange Sunstone, 8 x 6.2 mm Oval Cut From India

46.45 ct Fancy Jasper, 44.8 x 26.7 mm From Indonesia

3.7 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 11 x 9 mm

2.58 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gem, 11.1 x 8.2 mm

2.15 carat Orange Hessonite Garnet, Emerald Cut loose Hessonite Garnet from Sri Lanka, Natural Untreated Gem, 7.9 x 6 mm

0.34 ct Yellow Sphalerite, 4 mm Round Cut From Spain

3.1 ct Oval Cut Fire Opal, 12.4 x 9.4 mm From Mexico

0.84 carat Oval Grossularite Garnet, loose Certified Grossularite Garnet from Tanzania, Natural Untreated Gem, 6.2 x 5.2 mm

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

4.3 carat White Topaz, Oval loose Topaz from Brazil, Natural Untreated Gem, 11.1 x 9 mm

44.03 ct Loose Oval Bloodstone, 29.5 x 21.8 mm From Madagascar

3.06 ct Loose Trillion Cut Amethyst, 10.1 x 10.1 mm From Brazil

1.86 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 16.9 x 3.6 mm

3.02 carat Square Rhodolite Garnet, loose Certified Rhodolite Garnet from Mozambique, Natural Untreated Gems, 5 x 5 mm

4.38 carat Carved Leaf Ruby, loose Certified Ruby from Madagascar, Natural Gem, 14.8 x 11.1 mm

11.08 ct Green Amazonite, 8.3 mm Round Cut From Madagascar

4.83 ct Asscher Cut Rose Quartz, 11.3 x 11 mm From South Africa

15.99 ct Pink Coral, 15.3 x 11.1 mm Carved From Taiwan

3.55 ct White Moonstone, 12 x 9.5 mm Oval Cut From India

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