Calibrated 16 x 16 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 16 mm x 16 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 16x16 mm Gems

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

2.69 ct Round Strawberry Quartz, 8.1 mm From Brazil

1.51 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 9.3 x 4.8 mm

0.45 carat Bi-color Tourmaline, Baguette Sugarloaf Cabochon loose Tourmaline from Mozambique, Natural Untreated Gem, 6.4 x 3.7 mm

7.63 carat Yellow Citrine, Emerald Cut loose Citrine from Bolivia, Natural Untreated Gem, 13.9 x 10 mm

3.04 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 11.1 x 9.1 mm

0.6 ct Pink Spinel, 5.1 x 5 mm Cushion Cut From Tanzania

1.24 carat Marquise Cut Ruby, loose Certified Ruby from Myanmar, Natural Gem, 9.4 x 4.5 mm

7.02 ct Green Agate, 12.9 x 11.9 mm Oval Cut From India

1.81 carat Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7.1 x 5.2 mm

2.61 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 9.3 x 7.7 mm

4.19 ct Oval Fire Agate, 12.6 x 8.7 mm From Mexico

0.73 carat Pear Shape Peridot, loose Certified Peridot from China, Natural Untreated Gem, 6.9 x 4.8 mm

1.95 ct Cushion Cut Peridot, 8 x 7.4 mm From Myanmar

6.41 ct White Moonstone, 9 mm Round Cut From India

11.7 ct Rainbow Pyrite, 25.5 x 12.8 mm From Russia

2.72 ct Oval Prehnite, 9.6 x 7.9 mm From South Africa

4.75 carat White Topaz, Round loose Topaz from Brazil, Natural Untreated Gem, 10.3 mm

1.34 carat White Topaz, Oval loose Topaz from Brazil, Natural Untreated Gems, 6.2 x 4.2 mm

1.44 ct Loose Round Pietersite, 8.1 mm From Namibia

1.22 carat London Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 6.1 x 4.2 mm

17.09 carat Pink Kunzite, Pear Shape loose Kunzite from Afghanistan, Natural Untreated Gem, 23.9 x 10.9 mm

2.03 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6.9 x 5.1 mm

3.86 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 7 x 5.1 mm

4.68 carat White Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Gems, 5.8 mm

13.12 ct Black Spinel, 12.1 x 11.7 mm Heart Rose Cut From Thailand

36.66 ct Oval Boulder Opal, 39.1 x 16.4 mm From Australia

2.34 ct Oval Prehnite, 6.7 x 5.5 mm From South Africa

1.75 ct Cushion Checkerboard Smoky Quartz, 9 x 7 mm From Brazil

2.54 ct Oval Malachite, 8.5 x 6.6 mm From Congo

1.26 ct Yellow Beryl, 8.9 x 6.8 mm Oval Cut From Madagascar

5.5 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 9.9 x 8.1 mm

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