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

4.51 ct Round Labradorite, 10.1 mm From Madagascar

28.39 carat Black Tourmaline, Oval loose Tourmaline from Mozambique, Natural Untreated Gem, 21.7 x 18 mm

2.12 ct Oval Checkerboard Labradorite, 7.1 x 6 mm From Madagascar

3.12 ct Green Agate, 10.1 x 8.2 mm Oval Cut From India

36.82 ct Gray Jadeite, 29.5 x 26.6 mm Oval Cut From Myanmar

1.81 carat Blue Tanzanite, Pear Shape loose Tanzanite from Tanzania, Natural Gems, 5 x 3.1 mm

1.31 carat Oval Ruby, loose Certified Ruby from Myanmar, Natural Gem, 7.2 x 5.2 mm

8.36 carat Sky Blue Topaz, Marquise Cut loose Topaz from Brazil, Natural Gems, 14 x 8.1 mm

2.26 carat White Zircon, Diamond-Cut loose Zircon from Cambodia, Natural Gems, 5.9 mm

25.37 ct Yellow Quartz, 18.9 x 18.9 mm Cushion Checkerboard From Brazil

0.81 ct Loose Purple Sapphire, 5.1 x 4.1 mm Oval Cut From Madagascar

2.67 carat Round Ruby, loose Certified Ruby from Myanmar, Natural Gems, 3.8 mm

110.64 ct Druzy Citrine, 39.1 x 31.4 mm From Uruguay

46.16 ct Oval Rhodochrosite, 39.1 x 16.4 mm From South Africa

8.49 carat Swiss Blue Topaz, Marquise-Cut loose Topaz from Brazil, Natural Gems, 14 x 8 mm

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

92.27 ct Drilled Sphere Rhodochrosite, 16.8 mm From South Africa

10.23 carat Black Tourmaline, Emerald Cut loose Tourmaline from Tanzania, Natural Untreated Gem, 14 x 11.1 mm

3.79 carat Green Fluorite, Pear Shape loose Fluorite from India, Natural Untreated Gem, 11.8 x 8.2 mm

9.48 ct Yellow Quartz, 15.3 x 14.3 mm Carved From Brazil

4.41 ct Brown Moonstone, 10.2 x 10.1 mm Carved From India

1.76 carat Swiss Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 8.2 x 6.1 mm

14.13 ct Carved Prehnite, 17.5 x 11.8 mm From South Africa

1.35 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.5 x 6.1 mm

7.1 ct Baguette Rainbow Moonstone, 15.4 x 7.7 mm From the United States

0.79 ct Octagon Cut Peridot, 6.9 x 5 mm From China

2.63 ct Square Cut Rainbow Moonstone, 3 x 3 mm From India

12.24 carat Black Tourmaline, Cushion loose Tourmaline from Mozambique, Natural Untreated Gem, 15.4 x 11.5 mm

0.82 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gems, 6 x 4 mm

3.99 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 7 x 5 mm

1.04 ct Blue Kyanite, 5.1 mm Round Cut From Nepal

7.63 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gem, 16.2 x 12.1 mm

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