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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Overall Rating -> 9

Everything was good but since I am still new I was surprised at how small the stones where.

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Not easy enough to buy by exact size, and many stones aren't carbechon curved shape on top

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I did not realize how small the stone was. I cannot use it for the project I wanted, but I am keeping the stone and tru to use it in something else.

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Gemstones A-Z

Buy Heart Shape 12x12 mm Gems

1.37 carat Orange Hessonite Garnet, Oval loose from Madagascar, Natural Untreated Gem, 7.6 x 6.3 mm

0.82 ct Loose White Sapphire, 4.5 mm Diamond Cut From Madagascar

1.41 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gems, 7.1 x 5.1 mm

3.84 carat Bi-color Tourmaline, Emerald-Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 13.1 x 6 mm

3.59 carat Sky Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 6.9 x 5.1 mm

4.53 ct Loose Oval Cut Strawberry Quartz, 12.1 x 9.9 mm From India

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

0.62 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gem, 7.2 x 5 mm

0.35 ct Black Diamond, 3.3 x 3.2 mm Princess Cut From India

2.98 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gem, 12.1 x 9.8 mm

1.5 ct Violet Spinel, 7.2 x 6 mm Oval Cut From Tanzania

12.07 ct Green Jadeite, 18.4 x 14.1 mm Oval Cut From Myanmar

9.61 carat Bi-color Tourmaline, Carved Flower loose Tourmaline from Mozambique, Natural Untreated Gems, 13.9 x 13.8 mm

2.32 carat Marquise Cut Pyrope Garnet, loose Certified Pyrope Garnet from Mozambique, Natural Untreated Gems, 10 x 5.1 mm

9.19 ct Oval Agate, 14 x 12 mm From Indonesia

5.37 carat Pear Shape Opal, loose Certified Opal from Australia, Natural Untreated Gem, 16.5 x 11.1 mm

0.48 ct Loose Orange Sapphire, 4.6 x 4.5 mm Heart Cut From Tanzania

0.27 ct Octagon Cut Iolite, 4.9 x 3 mm From Madagascar

21.31 carat Swiss Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gem, 19 x 17.1 mm

0.72 ct Loose Yellow Sapphire, 5.7 x 4.3 mm Oval Cut From Madagascar

2.56 ct Loose Oval Malachite, 8.7 x 6.8 mm From Congo

0.87 carat Green Sapphire, Trillion-Cut loose Sapphire from Madagascar, Natural Gem, 5.7 x 5.5 mm

35.6 carat Pear Hematite, loose Certified Hematite from Brazil, Natural Untreated Gem, 23.8 x 17.5 mm

1.68 carat Yellow Morganite, Pear Shape loose Morganite from Afghanistan, Natural Untreated Gems, 8 x 6 mm

0.03 ct Green Diamond, 2.2 mm Diamond Cut From India

4.69 carat London Blue Topaz, Heart loose Topaz from Brazil, Natural Gem, 10.4 x 9.9 mm

6.65 ct Cushion Cut Color-Change Diaspore, 11.7 x 9.8 mm From Turkey

2.18 ct Orange Moonstone, 8.1 x 8.1 mm Cushion Cut From India

1.02 carat Yellow Citrine, Trillion loose Citrine from Brazil, Natural Untreated Gem, 7.1 x 7 mm

5.55 carat Blue Topaz, Carved Leaf loose Topaz from Brazil, Natural Gem, 12.6 x 10.8 mm

1.21 carat Pink Tourmaline, Emerald Cut loose Tourmaline from Mozambique, Natural Untreated Gem, 6.3 x 5.4 mm

2.57 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 11 x 9.1 mm

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