Calibrated 16 x 12 mm Oval Shape Natural Loose Gemstones: GemSelect

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 oval shapes, facet cut and cabochon gems available now in 16 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 usually 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 round shape settings will allow 0.3 mm or slightly higher even. This small variance can usually be accommodated for most 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 Oval Shape 16x12 mm Gems

13.12 ct Cushion Quartz With Marcasite, 16.9 x 13.4 mm From Brazil

1.56 ct Yellow Sphene, 6.2 x 5 mm Oval Cut From Sri Lanka

23.47 ct Multicolor Fossil Coral, 20.4 x 11.9 mm Oval Cut From Indonesia

6.85 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 14.5 x 10.9 mm

7.21 carat Blue Tanzanite, Oval loose Tanzanite from Tanzania, Natural Gems, 10 x 8.3 mm

30.34 ct Oval Tiger's Eye Matrix, 30.7 x 22.6 mm From Mexico

1.82 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 4.9 x 4.8 mm

4.72 ct Green Jade, 12.4 x 10.1 mm Oval Cut From Myanmar

4.89 carat Trillion Rhodolite Garnet, loose Certified Rhodolite Garnet from Mozambique, Natural Untreated Gems, 5.2 x 5.1 mm

0.62 ct Loose Orange Sapphire, 4.4 x 4.4 mm Cushion Cut From Tanzania

6.37 ct Round Larimar, 12.2 mm From the Dominican Republic

4.74 ct Yellow Agate, 11.6 x 10.3 mm Oval Cut From India

6.14 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 14.1 x 9.9 mm

3.23 ct Orange Moonstone, 10.3 x 5.1 mm Marquise Cut From India

67.17 ct Marquise Coral, 64.2 x 22.8 mm From Mexico

12.41 carat Cushion Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 15.1 x 14.9 mm

44.98 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 24.5 x 20.5 mm

0.69 ct Marquise Cut Peridot, 8.1 x 4.2 mm From China

0.38 ct Loose Yellow Sapphire, 4.9 x 3.2 mm Octagon Cut From Tanzania

32.89 carat Pear Coral, loose Certified Coral from Mexico, Natural Untreated Gem, 28.2 x 24.8 mm

1.2 ct Oval Cut Peridot, 8.1 x 6.1 mm From China

3.07 carat Yellow Citrine, Round loose Citrine from Brazil, Natural Untreated Gems, 8.2 mm

1.45 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 5 x 5 mm

0.96 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gem, 6.8 x 5 mm

0.38 ct Oval Cut Chrysoberyl Cat's Eye, 3.4 x 3.3 mm From Sri Lanka

0.64 ct Loose Orange Sapphire, 6 x 4 mm Oval Cut From Tanzania

6.52 ct Black Star Sapphire, 11.8 x 9 mm Oval Cut From Thailand

0.47 ct Blue Kyanite, 3.6 mm Round Cut From Nepal

0.5 carat Green Tourmaline, Baguette Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 5.2 x 3.8 mm

0.79 carat Blue Sapphire, Diamond-Cut loose Sapphire from Madagascar, Natural Gem, 5.5 mm

1.1 carat Yellow Citrine, Square loose Citrine from Brazil, Natural Untreated Gem, 5.9 x 5.8 mm

7.76 carat Swiss Blue Topaz, Emerald-Cut loose Topaz from Brazil, Natural Gems, 8.1 x 6 mm

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