Calibrated 12 x 10 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 12 x 10 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 12x10 mm Gems

14.24 ct Green Amazonite, 9.2 mm Round Cut From Madagascar

1.65 carat Blue Tanzanite, Oval loose Tanzanite from Tanzania, Natural Gem, 8.1 x 6 mm

4.74 carat Blue Tanzanite, Oval loose Tanzanite from Tanzania, Natural Gems, 9 x 7.3 mm

2.84 carat Blue Tanzanite, Oval loose Tanzanite from Tanzania, Natural Gem, 9 x 7 mm

1.25 ct Oval Sillimanite Cat's Eye, 7.2 x 5.1 mm From Madagascar

1.1 carat Purple Tourmaline, Oval loose Tourmaline from Mozambique, Natural Untreated Gem, 7.2 x 5.8 mm

0.33 ct Orange Sphalerite, 4.2 x 3.4 mm Oval Cut From Spain

1.08 carat Oval Opal, loose Certified Opal from Ethiopia, Natural Untreated Gem, 9 x 7.1 mm

4.66 carat Diamond-Cut Tsavorite Garnet, loose Certified Tsavorite Garnet from Kenya, Natural Untreated Gems, 2.1 mm

9.55 carat Black Tourmaline, Emerald Cut loose Tourmaline from Tanzania, Natural Untreated Gem, 14.6 x 11.4 mm

15.44 carat Square Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 7 x 7 mm

5.64 ct Baguette Tiger's Eye, 11.9 x 10 mm From Thailand

1.25 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 6.7 x 5.1 mm

1.96 carat Oval Opal, loose Certified Opal from Ethiopia, Natural Untreated Gem, 11.9 x 9.2 mm

0.81 ct Cushion Cut Color-Change Diaspore, 5.8 x 5.5 mm From Turkey

1.59 carat Green Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 16.4 x 3.4 mm

5.08 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 9.7 x 7.9 mm

1.1 carat Orange Sapphire, Pear Shape loose Sapphire from Tanzania, Natural Gems, 6.2 x 4.1 mm

0.41 ct Blue Apatite, 3.6 mm Round Cut From Madagascar

1.56 carat Orange Hessonite Garnet, Baguette Cut loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.4 x 5.2 mm

5.81 ct Cushion Tiger's Eye, 10.2 x 10.1 mm From Thailand

0.5 carat Orange Spessartite Garnet, Oval loose Spessartite Garnet from Mozambique, Natural Untreated Gem, 5.1 x 4.1 mm

3.82 carat Pear Pietersite, loose Certified Pietersite from Namibia, Natural Untreated Gem, 14.7 x 9.3 mm

24.28 carat Ammolite, loose Certified Ammolite from Canada, Natural Gem, 35.5 x 17.1 mm

31.18 ct Loose Round Labradorite, 25.4 mm From Madagascar

9.7 ct Loose Oval Lapis Lazuli, 14.9 x 11 mm From Afghanistan

18.59 carat Ammolite, loose Certified Ammolite from Canada, Natural Gem, 26.9 x 16.4 mm

6.48 ct Baguette Labradorite, 11.8 x 9.9 mm From Madagascar

2.89 ct Brown Cat's Eye Apatite, 8.8 x 6.7 mm Oval Cut From Kenya

0.41 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 6 x 4.1 mm

0.65 ct Loose Purple Sapphire, 8.8 x 4.9 mm Odd Shaped From Tanzania

1.45 ct Green Sphene, 6.8 x 6.2 mm Oval Cut From Sri Lanka

Gemstone Information

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