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

3.24 ct Orange Moonstone, 8.1 x 8 mm Trillion Cut From India

15.68 ct Trillion Obsidian, 25 x 21 mm From the United States

2.19 ct Loose Yellow Sapphire, 4.6 mm Round Cut From Thailand

0.95 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 5.9 x 4 mm

8.71 carat Swiss Blue Topaz, Carved Leaf loose Topaz from Brazil, Natural Gem, 13.6 x 13.3 mm

4.46 ct Loose Oval Cut Strawberry Quartz, 12 x 10 mm From India

3.57 ct Round Checkerboard Smoky Quartz, 7.9 mm From Brazil

3.2 ct Yellow Beryl, 11.1 x 8.7 mm Oval Cut From Brazil

6.29 ct Brown Moonstone, 10.8 x 10.7 mm Carved From India

6.75 carat Black Tourmaline, Oval loose Tourmaline from Mozambique, Natural Untreated Gem, 12 x 10.4 mm

1.76 ct Multicolor Mystic Quartz, 8.1 mm Round Concave Cut From Brazil

30.35 ct Cushion Jasper, 30.3 x 22.1 mm From Indonesia

4.15 ct Green Jade, 11.7 x 10.2 mm Oval Cut From Myanmar

0.4 ct Baguette Cut Kornerupine, 5.9 x 3.3 mm From Sri Lanka

25.8 ct Cushion Hematite, 18.9 x 16.5 mm From Brazil

0.86 carat Orange Hessonite Garnet, Square loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 5 x 4.9 mm

1.58 carat Oval Opal, loose Certified Opal from Australia, Natural Untreated Gem, 10.7 x 7.3 mm

38.19 ct Gray Jadeite, 28.7 x 20.5 mm Oval Cut From Myanmar

8.28 ct Odd Shaped Hemimorphite Druzy, 12.7 x 12.5 mm From Congo

1.95 carat Blue Tanzanite, Oval loose Tanzanite from Tanzania, Natural Gems, 6 x 3.9 mm

0.99 carat Round Ruby, loose Certified Ruby from Myanmar, Natural Gem, 5.7 mm

3.63 ct Round Checkerboard Smoky Quartz, 8.1 mm From Brazil

5.31 ct Yellow Moonstone, 7.3 x 7.3 mm Square Cut From India

40.6 ct Oval Jasper, 31.5 x 24 mm From Indonesia

5.31 ct Oval Malachite, 10.2 x 8.2 mm From Congo

1.09 ct Loose Princess Cut Sapphire, 2.2 x 2.1 mm From Tanzania

5.1 ct Yellow Quartz, 14 x 10 mm Carved From Brazil

0.65 ct Pink Spinel, 4.6 x 4.5 mm Cushion Cut From Tanzania

0.8 ct Oval Cut Peridot, 7.1 x 5.1 mm From China

6.17 carat Swiss Blue Topaz, Oval loose Topaz from Brazil, Natural Gems, 10.1 x 8.2 mm

6.43 ct Oval Larimar, 12.1 x 10 mm From the Dominican Republic

0.68 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gem, 7.2 x 5.1 mm

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