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: Octagon Shape 6x4 mm Gems
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You Selected (107): Octagon Shape 6x4 mm Gems Clear All
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ID: 4809164 pcs
thumb image of 2.7ct Octagon Step Cut Red Pyrope Garnet (ID: 480916)
2.65 ct Pyrope Garnet
6 x 4.1 mm
$ 18.55
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ID: 4749594 pcs
thumb image of 2.6ct Octagon Step Cut Lively Green Peridot (ID: 474959)
2.56 ct Peridot
5.9 x 4 mm
$ 64.00
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ID: 37086810 pcs
thumb image of 5ct Octagon Facet Yellow Golden Citrine (ID: 370868)
5.03 ct Citrine
6 x 4 mm
$ 30.18
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ID: 4749564 pcs
thumb image of 2.4ct Octagon Step Cut Lively Green Peridot (ID: 474956)
2.39 ct Peridot
6.1 x 4 mm
$ 59.75
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ID: 4749604 pcs
thumb image of 2.5ct Octagon Step Cut Lively Green Peridot (ID: 474960)
2.54 ct Peridot
5.9 x 4 mm
$ 63.50
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ID: 37086410 pcs
thumb image of 5.4ct Octagon Facet Yellow Golden Citrine (ID: 370864)
5.38 ct Citrine
6.1 x 4 mm
$ 32.28
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ID: 4228901 pcs
thumb image of 0.6ct Octagon Facet Green/Pink Color-Change Diaspore (ID: 422890)
0.63 ct Color-Change Diaspore
5.9 x 4 mm
$ 18.30
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ID: 4448822 pcs
thumb image of 1.3ct Octagon Facet Yellow Sapphire (ID: 444882)
1.29 ct Sapphire
6 x 4 mm
$ 155.52
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ID: 4808304 pcs
thumb image of 2.8ct Octagon / Scissor Cut Red Pyrope Garnet (ID: 480830)
2.81 ct Pyrope Garnet
6 x 4 mm
$ 19.67
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ID: 2795655 pcs
thumb image of 2.1ct Octagon Step Cut Violet Blue Iolite (ID: 279565)
2.06 ct Iolite
5.9 x 4 mm
$ 24.72
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ID: 4745275 pcs
thumb image of 2.7ct Octagon Step Cut Lively Green Peridot (ID: 474527)
2.66 ct Peridot
6.1 x 4 mm
$ 66.50
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ID: 2795695 pcs
thumb image of 2.6ct Octagon Step Cut Violet Blue Iolite (ID: 279569)
2.58 ct Iolite
6.1 x 3.9 mm
$ 30.96
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ID: 4751344 pcs
thumb image of 2.6ct Octagon Step Cut Lively Green Peridot (ID: 475134)
2.58 ct Peridot
5.9 x 4 mm
$ 64.50
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ID: 2913931 pcs
thumb image of 0.6ct Octagon Facet Green Emerald (ID: 291393)
0.57 ct Emerald
6.1 x 4.1 mm
$ 279.99
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ID: 4807544 pcs
thumb image of 2.6ct Octagon / Scissor Cut Red Pyrope Garnet (ID: 480754)
2.57 ct Pyrope Garnet
5.9 x 4 mm
$ 17.99
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ID: 3788415 pcs
thumb image of 2.5ct Octagon Facet Yellowish Green Tourmaline (ID: 378841)
2.51 ct Tourmaline
6 x 4 mm
$ 75.30
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ID: 4300504 pcs
thumb image of 3.4ct Octagon Facet Golden Orange Zircon (ID: 430050)
3.41 ct Zircon
6 x 4 mm
$ 51.15
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ID: 37087310 pcs
thumb image of 5.7ct Octagon Facet Yellow Golden Citrine (ID: 370873)
5.73 ct Citrine
6 x 4 mm
$ 34.38
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ID: 4751244 pcs
thumb image of 2ct Octagon Step Cut Lively Green Peridot (ID: 475124)
2.02 ct Peridot
6 x 3.9 mm
$ 50.50
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ID: 3787274 pcs
thumb image of 2.3ct Octagon Facet Yellowish Green Tourmaline (ID: 378727)
2.28 ct Tourmaline
6 x 4 mm
$ 68.40
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ID: 4443914 pcs
thumb image of 2.7ct Octagon Facet Multicolor Sapphire (ID: 444391)
2.69 ct Sapphire
6.1 x 4 mm
$ 324.31
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Octagon Shape 6x4 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 6 x 4 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