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

3.18 ct Oval Prehnite, 7.5 x 5.8 mm From South Africa

1.09 ct Loose Round Cut Smoky Quartz, 7 mm From Brazil

5.06 ct Marquise Slice Ruby in Fuchsite, 17.1 x 9.5 mm From Ethiopia

2.33 carat Orange Hessonite Garnet, Round loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.9 mm

2.05 carat Swiss Blue Topaz, Emerald-Cut loose Topaz from Brazil, Natural Gem, 8.1 x 6.1 mm

2.41 carat Oval Ruby, loose Certified Ruby from Madagascar, Natural Gems, 7 x 5 mm

0.67 carat Blue Sapphire, Oval loose Sapphire from Sri Lanka, Natural Gem, 6 x 4.2 mm

21 ct Green Amazonite, 10.3 mm Round Cut From Madagascar

5.58 carat Green Fluorite, Pear Shape loose Fluorite from India, Natural Untreated Gem, 14.3 x 9.3 mm

2.84 carat Yellow Citrine, Marquise Cut loose Citrine from Brazil, Natural Untreated Gem, 14.9 x 7.1 mm

0.84 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 9.1 x 4.1 mm

0.82 carat Blue Sapphire, Marquise-Cut loose Sapphire from Madagascar, Natural Gem, 8.2 x 4.1 mm

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

1.67 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7 x 5.1 mm

24.62 carat Ammolite, loose Certified Ammolite from Canada, Natural Gem, 26.1 x 22.7 mm

0.59 ct Loose Yellow Sapphire, 4.4 x 4.4 mm Square Cut From Tanzania

0.91 ct Octagon Cut Peridot, 7 x 5 mm From China

16.09 ct Oval Rose Quartz, 20.3 x 13.1 mm From South Africa

0.73 carat Orange Sapphire, Pear Shape loose Sapphire from Tanzania, Natural Gems, 5.1 x 3.9 mm

11 carat Pear Seraphinite, loose Certified Seraphinite from Russia, Natural Untreated Gems, 13.8 x 9.9 mm

6.23 ct Loose Baguette Tiger's Eye, 12 x 10 mm From Thailand

6.88 ct Oval Malachite, 13.7 x 9.7 mm From Congo

0.66 ct Purple Spinel, 5.1 mm Round Cut From Tanzania

4.33 ct Oval Spectrolite, 10.1 x 8.2 mm From Finland

1.55 ct Loose White Sapphire, 4.4 mm Diamond Cut From Madagascar

0.98 ct Round Strawberry Quartz, 7.1 mm From Russia

27.53 ct Drilled Sphere Rutile Quartz, 12.7 mm From India

8.46 ct Oval Nuummite, 13.3 x 12.6 mm From India

1.15 ct Loose Cushion Cut Sapphire, 5.7 x 5.7 mm From Madagascar

5.05 ct Round Cut Smoky Quartz, 11.4 mm From Brazil

82.02 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 31.1 x 26.9 mm

0.56 ct Loose Orange Sphalerite, 4.8 mm Round Cut From Spain

Gemstone Information

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