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Buy Heart Shape 12x12 mm Gems

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Gemtype Color Shape Weight Size Clarity Price Origin
You Selected (33): Heart Shape 12x12 mm Gems Clear All
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Lively Green Peridot Gem - 5.7ct Heart Facet (ID: 379031)

Heart Green Peridot

5.7ct
12.1 x 11.9 mm
$ 366.08
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2 pcs
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Black Spinel Gem - 7.1ct Heart Rose-Cut (ID: 328237)

Heart Black Spinel

7.13 ct (total 14.26ctw)
12.1 x 11.8 mm
$ 71.30
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2 pcs
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Lavender Blue Chalcedony Gem - 6.7ct Heart Cabochon (ID: 274068)

Heart Blue Chalcedony

6.69 ct (total 13.37ctw)
12.2 x 12.1 mm
$ 50.81
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2 pcs
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Lavender Blue Chalcedony Gem - 6.8ct Heart Cabochon (ID: 274086)

Heart Blue Chalcedony

6.76 ct (total 13.52ctw)
12.1 x 12 mm
$ 51.38
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Black Spinel Gem - 7.1ct Heart Rose-Cut (ID: 328318)

Heart Black Spinel

7.11 ct (total 14.22ctw)
12.1 x 11.8 mm
$ 71.10
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Black Spinel Gem - 6.6ct Heart Rose-Cut (ID: 328239)

Heart Black Spinel

6.56 ct (total 13.12ctw)
12.1 x 11.7 mm
$ 65.60
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Lavender Blue Chalcedony Gem - 6.5ct Heart Cabochon (ID: 324254)

Heart Blue Chalcedony

6.5ct
12.3 x 11.8 mm
$ 16.15
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Lavender Blue Chalcedony Gem - 6.6ct Heart Cabochon (ID: 274070)

Heart Blue Chalcedony

6.64 ct (total 13.27ctw)
12.2 x 12.1 mm
$ 50.43
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Black Spinel Gem - 7ct Heart Rose-Cut (ID: 328245)

Heart Black Spinel

7.02 ct (total 14.04ctw)
12.1 x 11.8 mm
$ 70.20
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Black Spinel Gem - 6.7ct Heart Rose-Cut (ID: 328236)

Heart Black Spinel

6.73 ct (total 13.46ctw)
12.1 x 11.8 mm
$ 67.30
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Black Spinel Gem - 6.7ct Heart Rose-Cut (ID: 328309)

Heart Black Spinel

6.74 ct (total 13.48ctw)
12.1 x 11.8 mm
$ 67.40
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Black Spinel Gem - 6.5ct Heart Rose-Cut (ID: 328238)

Heart Black Spinel

6.51 ct (total 13.02ctw)
12.1 x 11.9 mm
$ 65.10
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Multicolor Green Malachite Gem - 8.3ct Heart Cabochon (ID: 306724)

Heart Green Malachite

8.3ct
12.1 x 12.1 mm
$ 10.84
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2 pcs
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Black Spinel Gem - 7.2ct Heart Rose-Cut (ID: 328242)

Heart Black Spinel

7.19 ct (total 14.37ctw)
12 x 11.6 mm
$ 71.85
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2 pcs
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Black Spinel Gem - 6.9ct Heart Rose-Cut (ID: 328356)

Heart Black Spinel

6.93 ct (total 13.85ctw)
12.1 x 11.8 mm
$ 69.25
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Black Spinel Gem - 7ct Heart Rose-Cut (ID: 328246)

Heart Black Spinel

6.97 ct (total 13.94ctw)
12 x 11.7 mm
$ 69.70
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Lemon Quartz Gem - 7ct Heart Checkerboard (double sided) (ID: 417131)

Heart Yellow Quartz

7ct
12.5 x 12.2 mm
$ 21.09
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Black Spinel Gem - 7ct Heart Rose-Cut (ID: 328247)

Heart Black Spinel

6.97 ct (total 13.94ctw)
12.1 x 11.6 mm
$ 69.70
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2 pcs
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Black Spinel Gem - 7.3ct Heart Rose-Cut (ID: 328314)

Heart Black Spinel

7.33 ct (total 14.66ctw)
11.8 x 12 mm
$ 79.99
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2 pcs
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Black Spinel Gem - 6.8ct Heart Rose-Cut (ID: 328316)

Heart Black Spinel

6.78 ct (total 13.56ctw)
12.1 x 11.7 mm
$ 67.80
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2 pcs
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Black Spinel Gem - 7ct Heart Rose-Cut (ID: 328311)

Heart Black Spinel

6.97 ct (total 13.94ctw)
12.1 x 11.7 mm
$ 69.70
Item in Stock
1 2
Heart Shape 12x12 mm Gems
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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As Always never disappointed in any gemstone I purchase from this site. I have never had a problem. Thank-You Gemselect for offering such a comprehensive variety . I will continue to order from this site.
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Easy to find what i'm looking for on website, very clear, like photos
Posted By Lifter in January, 2019
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Better than what I expected. Beautifully cut gem!
Posted By in January, 2019
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Gem select is the most trustworthy web site for gems. What I see in the picture is exactly what I get. Size is indicated by carat weight, and not the picture size, as they are trying to give an up close view of the gem I am hoping to buy. It was so easy to find the stones I was looking for at a price I could afford.
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Size and Weight

Gems are always measured in Millimeter (mm)

Dimensions are given as;
length x width x depth,
except for round stones which are;
diameter x depth

Select gems by size, not by weight!
Gem varieties vary in density, so carat weight is not a good indication of size

Note: 1ct = 0.2g

Size Comparison Chart