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

0.58 carat Blue Sapphire, Cushion loose Sapphire from Madagascar, Natural Gem, 5.2 x 4.2 mm

7.87 ct Oval Tiger's Eye, 12.4 x 8.3 mm From Thailand

62.76 ct Oval Jasper, 37.8 x 23.4 mm From Indonesia

1.09 carat Red Tourmaline, Round Cabochon loose Tourmaline from Mozambique, Natural Untreated Gem, 8.9 mm

1.36 ct Round Cut Strawberry Quartz, 7 mm From Russia

2.06 carat Orange Sapphire, Pear Shape loose Sapphire from Tanzania, Natural Gems, 6.1 x 4.8 mm

0.66 ct Loose Pink Sapphire, 6.7 x 5.4 mm Odd Shaped From Madagascar

5.33 ct Octagon Cut Smoky Quartz, 11.1 x 11 mm From Brazil

2.52 carat Briolette Tourmaline, loose Certified Tourmaline from Mozambique, Natural Untreated Gems, 6.5 mm

4.94 carat Pink Morganite, Pear loose Morganite from Afghanistan, Natural Untreated Gem, 14.2 x 8.9 mm

2.73 ct Oval Prehnite, 8.6 x 7.1 mm From South Africa

1.8 ct Oval Cat's Eye Opal, 8.9 x 6.4 mm From Madagascar

28.32 ct Cushion Coral, 25.3 x 20.3 mm From Mexico

5.61 ct Loose Oval Lapis Lazuli, 14 x 10.5 mm From Afghanistan

0.54 ct Loose Yellow Sapphire, 3.4 x 3.4 mm Princess Cut From Tanzania

6.37 carat Black Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 12.9 x 8.5 mm

0.52 ct Pink Spinel, 4.9 x 4.3 mm Cushion Cut From Tanzania

3.1 ct Red Andesine Labradorite, 11.1 x 9 mm Oval Cut From Congo

13.23 ct Oval Serpentine, 24.2 x 15.2 mm From the United States

1.24 carat Yellow Citrine, Square loose Citrine from Brazil, Natural Untreated Gem, 6.1 x 6 mm

0.17 ct White Diamond, 2.8 mm Diamond Cut From Brazil

11.92 ct Loose Pear Dendritic Agate, 17.9 x 12.9 mm From India

7.59 ct Round Quartz Cat's Eye, 12 mm From India

3.73 carat Yellow Citrine, Square loose Citrine from Brazil, Natural Untreated Gems, 7.2 x 7.1 mm

2.06 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 8.5 x 6.8 mm

11.99 ct Black Spinel, 11.9 mm Round Rose Cut From Thailand

41.05 carat Green Amazonite, Pear loose Amazonite from Madagascar, Natural Untreated Gem, 38 x 24.3 mm

1.16 carat Opal, loose Certified Opal from Ethiopia, Natural Gem, 9.4 x 7.8 mm

0.4 ct Blue Apatite, 3.5 mm Round Cut From Madagascar

54.14 carat Pear Hematite, loose Certified Hematite from Brazil, Natural Untreated Gems, 22.8 x 16.1 mm

1.5 ct Loose Princess Cut Sapphire, 2.3 x 2.4 mm From Tanzania

2.91 ct Drilled Cut Sphere Smoky Quartz, 5.9 mm From Brazil

Gemstone Information

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