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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (207): Octagon Shape 7x5 mm Gems Clear All
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ID: 4297961 pcs
1.45ct Zircon
7.11mm x 4.86mm x 3.10mm
USD 21.75
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ID: 3379001 pcs
0.94ct Emerald
7.00mm x 4.94mm x 3.46mm
USD 253.80
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ID: 4052294 pcs
5.02ctw Topaz
7.08mm x 5.05mm x 3.83mm
USD 34.89
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ID: 3988394 pcs
5.56ctw Hessonite Garnet
6.92mm x 5.01mm x 3.99mm
USD 111.20
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ID: 4051164 pcs
4.46ctw Topaz
7.09mm x 5.06mm x 3.53mm
USD 31.00
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ID: 4297561 pcs
1.64ct Zircon
7.23mm x 5.10mm x 3.21mm
USD 32.80
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ID: 37170212 pcs
13.39ctw Almandine Garnet
7.23mm x 5.00mm x 2.77mm
USD 66.95
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ID: 2751465 pcs
5.31ctw Citrine
7.07mm x 5.06mm x 3.80mm
USD 27.88
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ID: 4298701 pcs
1.58ct Zircon
7.09mm x 4.99mm x 3.33mm
USD 23.70
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ID: 3971871 pcs
1.14ct Color-Change Diaspore
6.88mm x 5.13mm x 3.50mm
USD 54.45
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ID: 2751445 pcs
5.38ctw Citrine
7.04mm x 5.04mm x 3.83mm
USD 28.25
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ID: 3921434 pcs
4.63ctw Hessonite Garnet
6.88mm x 5.03mm x 3.34mm
USD 92.60
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ID: 3988404 pcs
4.24ctw Hessonite Garnet
6.74mm x 5.00mm x 3.24mm
USD 84.80
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ID: 3919323 pcs
3.26ctw Hessonite Garnet
6.88mm x 4.93mm x 3.29mm
USD 65.20
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ID: 3948662 pcs
2.00ctw Hessonite Garnet
6.80mm x 4.84mm x 3.11mm
USD 27.66
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ID: 4314891 pcs
1.01ct Hessonite Garnet
6.93mm x 5.17mm x 2.94mm
USD 18.18
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ID: 3716796 pcs
6.32ctw Almandine Garnet
6.93mm x 4.93mm x 2.96mm
USD 31.60
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ID: 4052344 pcs
5.02ctw Topaz
7.13mm x 5.10mm x 3.76mm
USD 34.89
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ID: 4297202 pcs
3.04ctw Zircon
7.25mm x 5.04mm x 3.05mm
USD 45.60
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ID: 4297182 pcs
3.06ctw Zircon
7.11mm x 4.89mm x 3.19mm
USD 45.90
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ID: 3919292 pcs
2.19ctw Hessonite Garnet
6.82mm x 4.94mm x 3.22mm
USD 43.80
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Octagon Shape 7x5 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 7 x 5 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