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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (198): Round Shape 3 mm Gems Clear All
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ID: 43090212 pcs
1.35ctw Sapphire
2.88mm x 1.70mm
USD 86.35
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ID: 40199220 pcs
2.38ctw Ruby
2.91mm x 1.72mm
USD 330.58
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ID: 4296006 pcs
0.60ctw Emerald
2.89mm x 2.05mm
USD 210.00
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ID: 34738815 pcs
2.73ctw Sapphire
3.02mm x 1.81mm
USD 136.50
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ID: 42196320 pcs
2.08ctw Sapphire
2.88mm x 1.89mm
USD 62.40
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ID: 40966510 pcs
1.50ctw Sapphire
3.06mm x 2.30mm
USD 52.50
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ID: 4295276 pcs
0.74ctw Emerald
3.06mm x 2.08mm
USD 259.00
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ID: 4295265 pcs
0.52ctw Emerald
3.00mm x 1.97mm
USD 182.00
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ID: 38564120 pcs
2.89ctw Demantoid Garnet
3.11mm x 2.29mm
USD 201.43
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ID: 38609210 pcs
1.64ctw Demantoid Garnet
3.10mm x 2.12mm
USD 114.19
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ID: 38515020 pcs
2.31ctw Demantoid Garnet
2.92mm x 2.08mm
USD 160.94
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ID: 38609110 pcs
1.51ctw Demantoid Garnet
3.12mm x 2.21mm
USD 105.14
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ID: 40210910 pcs
1.60ctw Ruby
3.07mm x 2.20mm
USD 222.24
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ID: 34485420 pcs
3.54ctw Sapphire
3.09mm x 1.80mm
USD 177.85
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ID: 40207315 pcs
1.84ctw Ruby
2.89mm x 1.67mm
USD 255.58
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ID: 40217410 pcs
1.52ctw Ruby
3.12mm x 1.99mm
USD 211.13
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ID: 40207015 pcs
1.85ctw Ruby
2.97mm x 1.77mm
USD 256.97
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ID: 40965910 pcs
1.36ctw Sapphire
3.00mm x 2.13mm
USD 47.60
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ID: 40896410 pcs
1.05ctw Sapphire
2.89mm x 1.75mm
USD 47.25
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ID: 42196220 pcs
2.23ctw Sapphire
2.91mm x 1.85mm
USD 66.90
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ID: 40207215 pcs
1.74ctw Ruby
2.93mm x 1.60mm
USD 241.69
Item in Stock
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Round Shape 3 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 3 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