Calibrated Heart Shape Gemstones 12 x 12 mm size from GemSelect

Some people by gems by color or price, but for many, it may be better to buy gems by size - especially if you're in need to a gem to replace another previous item that was lost or damaged: Calibrated heart shaped facet cut gems and cabochon gems in 12 x 12 mm size. Buy a wide range of calibrated gemstones by size at wholesale from GemSelect.

As a general guideline, when it comes to 'calibrated' gems, they are not meant nor 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 around 0.3 mm or slightly higher even. This small variance can usually be accommodated for 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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Perfect size I was looking for and great price

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Best place to buy gem stones, dont bother shopping else where. Prices are great, no issues with shipping and customer service is the best.

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Gemstones A-Z

Buy Heart Shape 12x12 mm Gems

19.53 ct Rainbow Pyrite, 23.8 x 17.9 mm From Russia

3.99 ct Orange Moonstone, 8.2 x 8 mm Trillion Cut From India

18.88 ct Pencil Cut Jasper, 29 mm From India

2.16 carat Yellow Citrine, Heart loose Citrine from Brazil, Natural Untreated Gems, 7.1 x 6.9 mm

0.56 ct Loose Violet Sapphire, 5.8 x 4.2 mm Oval Cut From Tanzania

1.4 ct Oval Cut Black Opal, 10.4 x 7.4 mm From Ethiopia

10.4 ct Fancy Boulder Opal, 19.5 x 12.6 mm From Australia

72.98 ct Fancy Charoite, 43.6 x 28.3 mm From Russia

4.88 ct Yellow Moonstone, 12.3 x 8.6 mm Oval Cut From India

2.13 carat Pear Rutile Quartz, loose Certified Rutile Quartz from India, Natural Untreated Gem, 10.1 x 7.4 mm

0.78 carat Blue Sapphire, Diamond-Cut loose Sapphire from Madagascar, Natural Gem, 5.6 mm

9.94 ct Carved Prehnite, 16.3 x 12.1 mm From South Africa

7.3 ct White Moonstone, 9 mm Round Cut From India

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

2.32 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gems, 9.1 x 6.1 mm

44.19 ct Baguette Tiger's Eye Matrix, 28.3 x 23.2 mm From Mexico

3.19 carat Swiss Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7.2 x 5.1 mm

1.64 carat Pear Prehnite, loose Certified Prehnite from South Africa, Natural Untreated Gem, 8.4 x 6.1 mm

0.23 ct Square Cut Iolite, 3.5 x 3.5 mm From Madagascar

1.6 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7.1 x 5.1 mm

55.96 ct Oval Jasper, 43.2 x 22.6 mm From Indonesia

38.05 ct Pencil Cut Jasper, 40.6 x 11.4 mm From Indonesia

0.98 carat London Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 7.2 x 5.3 mm

1.08 ct Octagon Cut Color-Change Diaspore, 5.9 x 4.9 mm From Turkey

2.38 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 7.1 x 5.1 mm

9.78 ct Green Jadeite, 17.9 x 14.4 mm Oval Cut From Myanmar

8.08 ct Amethyst Geode Slice, 17.4 x 12.5 mm From Brazil

26.21 ct Oval Checkerboard Labradorite, 22.5 x 16.3 mm From Madagascar

7.47 ct Asscher Cut Smoky Quartz, 12 x 12 mm From Brazil

0.91 carat Square Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 4.2 x 4.1 mm

0.43 carat Round Grossularite Garnet, loose Certified Grossularite Garnet from Tanzania, Natural Untreated Gem, 4.7 mm

1.27 carat Pink Tourmaline, Oval loose from Mozambique, Natural Untreated Gem, 7.1 x 5.7 mm

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