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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (201): Octagon Shape 7x5 mm Gems Clear All
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ID: 4053234 pcs
4.71ctw Topaz
7.06 x 5.07 x 3.45mm
USD 32.73
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ID: 3919323 pcs
3.26ctw Hessonite Garnet
6.88 x 4.93 x 3.29mm
USD 65.20
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ID: 4299371 pcs
1.52ct Zircon
7.01 x 5.12 x 2.96mm
USD 22.80
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ID: 4052344 pcs
5.02ctw Topaz
7.13 x 5.10 x 3.76mm
USD 34.89
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ID: 3787101 pcs
1.10ct Tourmaline
7.11 x 5.06 x 3.69mm
USD 50.05
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ID: 4052894 pcs
4.26ctw Topaz
7.06 x 5.06 x 3.38mm
USD 29.61
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ID: 4261631 pcs
0.96ct Tourmaline
7.23 x 5.16 x 3.13mm
USD 18.40
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ID: 3919302 pcs
2.59ctw Hessonite Garnet
7.00 x 5.18 x 3.69mm
USD 51.80
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ID: 4050862 pcs
2.17ctw Topaz
7.24 x 5.08 x 3.26mm
USD 15.08
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ID: 4314891 pcs
1.01ct Hessonite Garnet
6.93 x 5.17 x 2.94mm
USD 18.18
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ID: 3235591 pcs
0.94ct Emerald
6.90 x 4.89 x 3.40mm
USD 248.16
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ID: 4051154 pcs
4.26ctw Topaz
7.05 x 5.04 x 3.27mm
USD 29.61
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ID: 2751375 pcs
5.19ctw Citrine
6.94 x 4.98 x 4.28mm
USD 27.25
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ID: 3937372 pcs
2.33ctw Hessonite Garnet
6.88 x 4.98 x 3.43mm
USD 32.62
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ID: 4397601 pcs
1.33ct Spessartite Garnet
7.06 x 4.98 x 3.25mm
USD 33.25
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ID: 4398631 pcs
1.54ct Spessartite Garnet
7.27 x 4.97 x 3.92mm
USD 38.50
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ID: 3651605 pcs
5.24ctw Almandine Garnet
7.07 x 5.07 x 2.64mm
USD 16.35
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ID: 3937382 pcs
2.81ctw Hessonite Garnet
6.77 x 5.01 x 4.02mm
USD 39.34
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ID: 3963381 pcs
0.86ct Color-Change Diaspore
6.95 x 4.87 x 2.62mm
USD 41.07
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ID: 3936714 pcs
4.34ctw Hessonite Garnet
6.83 x 4.97 x 2.90mm
USD 60.76
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ID: 3530861 pcs
0.80ct Emerald
6.94 x 4.84 x 3.24mm
USD 243.81
Item in Stock
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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