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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (276): Round Shape 13 mm Gems Clear All
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ID: 4200961 pcs
9.84ct Topaz
13.24mm x 8.21mm
USD 68.88
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ID: 4080111 pcs
6.30ct Smoky Quartz
12.59mm x 8.80mm
USD 11.28
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ID: 4033921 pcs
8.38ct Rutile Quartz
13.20mm x 6.43mm
USD 26.56
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ID: 4078021 pcs
11.60ct Maw-Sit-Sit
13.22mm x 8.05mm
USD 23.20
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ID: 4324831 pcs
10.68ct Smoky Quartz
13.06mm x 11.43mm
USD 18.16
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ID: 3335801 pcs
12.32ct Pearl
12.76mm
USD 184.80
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ID: 4087401 pcs
6.90ct Quartz
13.01mm x 9.14mm
USD 10.70
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ID: 4037142 pcs
16.58ctw Rutile Quartz
13.23mm x 6.58mm
USD 52.56
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ID: 4208941 pcs
7.19ct Star Moonstone
13.42mm x 5.71mm
USD 21.57
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ID: 3240761 pcs
9.03ct Smoky Quartz
13.28mm x 7.10mm
USD 7.68
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ID: 4209111 pcs
8.70ct Star Moonstone
12.52mm x 7.18mm
USD 26.10
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ID: 3335791 pcs
11.77ct Pearl
13.11mm
USD 176.55
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ID: 4031562 pcs
17.70ctw Rutile Quartz
13.23mm x 6.59mm
USD 53.10
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ID: 4036882 pcs
15.66ctw Rutile Quartz
12.80mm x 6.39mm
USD 49.64
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ID: 3936581 pcs
11.10ct Hessonite Garnet
13.30mm x 6.21mm
USD 111.00
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ID: 4031572 pcs
14.00ctw Rutile Quartz
13.23mm x 5.31mm
USD 42.00
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ID: 3638661 pcs
9.06ct Amethyst
13.16mm x 7.64mm
USD 45.30
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ID: 4069561 pcs
9.65ct Maw-Sit-Sit
13.45mm x 6.54mm
USD 27.21
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ID: 4080971 pcs
6.57ct Smoky Quartz
12.82mm x 8.78mm
USD 11.76
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ID: 4234502 pcs
34.52ctw Rutile Quartz
13.50mm
USD 27.62
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ID: 4035951 pcs
8.52ct Rutile Quartz
12.82mm x 6.61mm
USD 27.01
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Round Shape 13 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 Round shapes, facet cut and cabochon gems available now in 13 mm diameter 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 around 0.3 mm or slightly higher even. This small variance can usually be accommodated for 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