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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (219): Round Shape 3 mm Gems Clear All
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ID: 40914310 pcs
1.36ctw Sapphire
3.03mm x 1.94mm
USD 61.20
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ID: 38624410 pcs
1.50ctw Demantoid Garnet
3.11mm x 2.29mm
USD 104.44
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ID: 40208115 pcs
1.96ctw Ruby
2.96mm x 1.84mm
USD 272.24
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ID: 40965910 pcs
1.36ctw Sapphire
3.00mm x 2.13mm
USD 47.60
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ID: 40215310 pcs
1.24ctw Ruby
3.00mm x 1.81mm
USD 172.24
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ID: 38583810 pcs
1.40ctw Demantoid Garnet
3.06mm x 2.09mm
USD 97.48
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ID: 38663710 pcs
1.33ctw Demantoid Garnet
3.12mm x 1.92mm
USD 92.82
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ID: 43044110 pcs
1.09ctw Sapphire
2.88mm x 1.73mm
USD 69.72
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ID: 41986120 pcs
2.38ctw Sapphire
2.89mm x 2.28mm
USD 83.30
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ID: 40196810 pcs
1.34ctw Ruby
2.90mm x 1.95mm
USD 186.13
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ID: 38639810 pcs
1.52ctw Demantoid Garnet
3.04mm x 2.28mm
USD 106.08
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ID: 38563720 pcs
2.56ctw Demantoid Garnet
3.02mm x 2.06mm
USD 178.43
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ID: 38552720 pcs
2.74ctw Demantoid Garnet
3.10mm x 2.11mm
USD 190.98
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ID: 38035720 pcs
2.38ctw Tsavorite Garnet
3.05mm x 2.07mm
USD 218.56
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ID: 40915210 pcs
1.20ctw Sapphire
2.93mm x 1.95mm
USD 54.00
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ID: 40196510 pcs
1.23ctw Ruby
3.01mm x 1.78mm
USD 170.85
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ID: 38639410 pcs
1.44ctw Demantoid Garnet
3.09mm x 2.13mm
USD 100.50
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ID: 4292444 pcs
0.38ctw Emerald
2.98mm x 1.89mm
USD 133.00
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ID: 4246469 pcs
1.32ctw Sapphire
3.09mm x 2.02mm
USD 52.80
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ID: 40199020 pcs
2.01ctw Ruby
2.89mm x 1.60mm
USD 279.19
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ID: 40196610 pcs
1.31ctw Ruby
2.97mm x 1.89mm
USD 181.96
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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