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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (102): Octagon Shape 6x4 mm Gems Clear All
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ID: 37087010 pcs
thumb image of 4.9ct Octagon Facet Yellow Golden Citrine (ID: 370870)
4.85 ct Citrine
6 x 4.1 mm
$ 29.10
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ID: 3788354 pcs
thumb image of 2.3ct Octagon Facet Yellowish Green Tourmaline (ID: 378835)
2.31 ct Tourmaline
6.1 x 4 mm
$ 105.10
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ID: 4302501 pcs
thumb image of 0.4ct Octagon Facet Violet Blue Iolite (ID: 430250)
0.42 ct Iolite
6 x 4.1 mm
$ 8.40
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ID: 31531710 pcs
thumb image of 4.5ct Octagon Step Cut Yellow Golden Citrine (ID: 315317)
4.52 ct Citrine
6 x 4 mm
$ 23.73
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ID: 4573592 pcs
thumb image of 1.4ct Octagon Step Cut Multicolor Mystic Topaz (ID: 457359)
1.43 ct Mystic Topaz
5.9 x 4 mm
$ 7.15
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ID: 4573562 pcs
thumb image of 1.4ct Octagon Step Cut Multicolor Mystic Topaz (ID: 457356)
1.44 ct Mystic Topaz
5.9 x 4 mm
$ 7.20
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ID: 4573452 pcs
thumb image of 1.4ct Octagon Step Cut Multicolor Mystic Topaz (ID: 457345)
1.44 ct Mystic Topaz
6 x 4.1 mm
$ 7.20
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ID: 3784882 pcs
thumb image of 1.1ct Octagon Facet Yellowish Green Tourmaline (ID: 378488)
1.14 ct Tourmaline
6 x 4 mm
$ 34.20
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ID: 4573412 pcs
thumb image of 1.5ct Octagon Step Cut Multicolor Mystic Topaz (ID: 457341)
1.48 ct Mystic Topaz
5.9 x 4 mm
$ 7.40
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ID: 3783252 pcs
thumb image of 1ct Octagon Facet Yellowish Green Tourmaline (ID: 378325)
0.99 ct Tourmaline
6 x 4 mm
$ 29.70
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ID: 4573382 pcs
thumb image of 1.5ct Octagon Step Cut Multicolor Mystic Topaz (ID: 457338)
1.49 ct Mystic Topaz
6 x 4 mm
$ 7.45
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ID: 2791826 pcs
thumb image of 3.2ct Octagon Facet Violet Blue Iolite (ID: 279182)
3.20 ct Iolite
6 x 4 mm
$ 44.80
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ID: 3784892 pcs
thumb image of 1ct Octagon Facet Yellowish Green Tourmaline (ID: 378489)
1.00 ct Tourmaline
6 x 4 mm
$ 30.00
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ID: 4573532 pcs
thumb image of 1.5ct Octagon Step Cut Multicolor Mystic Topaz (ID: 457353)
1.48 ct Mystic Topaz
6 x 4 mm
$ 7.40
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ID: 3997626 pcs
thumb image of 4ct Octagon Facet Swiss Blue Topaz (ID: 399762)
3.98 ct Topaz
6.1 x 4.1 mm
$ 27.86
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ID: 4573512 pcs
thumb image of 1.5ct Octagon Step Cut Multicolor Mystic Topaz (ID: 457351)
1.48 ct Mystic Topaz
6 x 4 mm
$ 7.40
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ID: 2791816 pcs
thumb image of 3.1ct Octagon Facet Violet Blue Iolite (ID: 279181)
3.13 ct Iolite
6 x 4 mm
$ 43.82
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ID: 2795655 pcs
thumb image of 2.1ct Octagon Facet Violet Blue Iolite (ID: 279565)
2.06 ct Iolite
5.9 x 4 mm
$ 24.72
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ID: 37086510 pcs
thumb image of 4.4ct Octagon Facet Yellow Golden Citrine (ID: 370865)
4.42 ct Citrine
6 x 4 mm
$ 26.52
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ID: 2795695 pcs
thumb image of 2.6ct Octagon Facet Violet Blue Iolite (ID: 279569)
2.58 ct Iolite
6.1 x 3.9 mm
$ 30.96
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ID: 2914071 pcs
thumb image of 0.5ct Octagon Step Cut Green Emerald (ID: 291407)
0.53 ct Emerald
6.1 x 4.1 mm
$ 212.00
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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