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: Octagon Shape 14x12 mm Gems
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You Selected (2): Octagon Shape 14x12 mm Gems Clear All
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ID: 4597911 pcs
thumb image of 8.9ct Octagon Step Cut Yellow Golden Citrine (ID: 459791)
8.87 ct Citrine
13.9 x 11.8 mm
$ 62.09
Item in Stock
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ID: 4597921 pcs
thumb image of 10.6ct Octagon Step Cut Yellow Golden Citrine (ID: 459792)
10.63 ct Citrine
13.9 x 11.7 mm
$ 74.41
Item in Stock
Octagon Shape 14x12 mm Gems
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 Octagon shape / Emerald-Cut, faceted and cabochon gems available now in 14 x 12 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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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