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 -> 7

I placed order#384714 based on the picture on your website and the stone came in much darker. I'm sure it's the same stone i ordered but your lighting made it seem a lighter blue. I was trying to match a stone for a customer and based on the picture it would have been close enough but the stone in person is a mile off.

Posted By Bobk in February, 2024

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Overall Rating -> 10

Very easy. I have purchased a few times before and was satisfied each time. Thank you.

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Overall Rating -> 10

love yall

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Overall Rating -> 10

Easy and fast

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Overall Rating -> 10

I searched for the item by description and millimeter and had my choice come up and then made the best selection.

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Overall Rating -> 10

Selection ability was straightforward and easy.

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Overall Rating -> 10

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Overall Rating -> 9

An it was good.

Posted By Miguel in June, 2023

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Overall Rating -> 10

I love your selection of gems. My only complaing is I wish I could put in a page number to return to that page.When there are over 60 pages of gems it is hard to return to a page with a gem I am considering.

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Overall Rating -> 10

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Overall Rating -> 10

Was easy to search for many gems and mineral stones.Authenticity of natural stones is important, and I feel this site offers some assurance on this.

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Overall Rating -> 10

Love gemselect

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Overall Rating -> 10

Found the stone I wanted which was delivered quickly and met expectations.

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Overall Rating -> 10

I really enjoy browsing through GemSelect. The selection is always marvelous and I love how detailed everything is described. The only thing I noticed is that when browsing through my phone, the videos of the gems do not load. If there were more videos of the gems, that would be amazing, though I understand that is a lot of work on GemSelect's part! Checking out is also very fast and easy, and I love that the return policy is very good, though I hope I don't have to use it anytime soon.

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Overall Rating -> 10

i love this site, the gems are always of good quality, i've been buy gifts from the site for 10 years, love it

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Gemstones A-Z

Buy Heart Shape 12x12 mm Gems

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

1.04 ct Octagon Cut Peridot, 7 x 5 mm From China

28.12 ct Fancy Jasper, 32.1 x 20.6 mm From Indonesia

1.56 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.7 x 6.5 mm

2.89 ct Round Cat's Eye Scapolite, 8.8 mm From Madagascar

1.39 ct Purple Spinel, 6.8 x 6.4 mm Cushion Cut From Tanzania

2.26 carat White Zircon, Oval loose Zircon from Cambodia, Natural Gems, 6.9 x 5 mm

13.97 ct Baguette Pietersite, 20.4 x 12.3 mm From Namibia

0.54 ct Loose Orange Sapphire, 5.7 x 3.8 mm Oval Cut From Tanzania

2.94 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 10.7 x 8.8 mm

0.9 carat Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gem, 7.1 x 5.2 mm

1.75 carat Swiss Blue Topaz, Oval loose Topaz from Brazil, Natural Gem, 8.1 x 6.1 mm

6.17 ct Oval Nuummite, 13.1 x 12.4 mm From India

8.28 ct Loose Pear Dendritic Agate, 18.3 x 13.1 mm From India

3.79 carat White Topaz, Princess-Cut loose Topaz from Brazil, Natural Untreated Gems, 3.5 x 3.5 mm

3.04 carat Yellow Citrine, Cushion loose Citrine from Brazil, Natural Untreated Gem, 11.5 x 8.3 mm

15.24 carat Trillion-Cut Tsavorite Garnet, loose Certified Tsavorite Garnet from Tanzania, Natural Untreated Gem, 15.7 x 15.3 mm

3.04 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 7.1 x 5.1 mm

5.22 ct Round Rutile Quartz, 11 mm From India

1.74 ct Loose Oval Cut Black Opal, 12 x 8.7 mm From Ethiopia

15.33 carat Pear Rutile Quartz, loose Certified Rutile Quartz from India, Natural Untreated Gem, 19.1 x 15.8 mm

7.67 carat Cushion Ruby, loose Certified Ruby from Madagascar, Natural Gem, 10.3 x 10.1 mm

1.42 ct Loose Trillion Cut Mystic Quartz, 6.1 x 6 mm From Brazil

7.11 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 14.8 x 11.3 mm

6.93 carat Oval Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gems, 12.2 x 8 mm

4.38 carat Sky Blue Topaz, Marquise Cut loose Topaz from Brazil, Natural Gems, 12.1 x 6 mm

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

0.58 ct Loose Yellow Sapphire, 3.5 x 3.5 mm Princess Cut From Tanzania

1.8 carat Round Cabochon Emerald, loose Certified Emerald from Colombia, Natural Gem, 7.3 mm

5.36 ct Yellow Agate, 12.7 x 10.5 mm Oval Cut From India

1.51 carat Trillion Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 8.3 x 8.2 mm

0.92 carat Yellow Citrine, Trillion loose Citrine from Brazil, Natural Untreated Gem, 6.9 x 6.7 mm

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