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You Selected (201): Round Shape 3 mm Gems Clear All
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ID: 40966810 pcs
thumb image of 1.4ct Diamond-Cut Multicolor Sapphire (ID: 409668)
1.40ct Sapphire
3.08 x 2.23mm
USD 49.00
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ID: 40943310 pcs
thumb image of 1.3ct Diamond-Cut Pink Sapphire (ID: 409433)
1.32ct Sapphire
3.03 x 2.01mm
USD 59.40
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ID: 34710115 pcs
thumb image of 2.1ct Round Cabochon Multicolor Sapphire (ID: 347101)
2.05ct Sapphire
2.91 x 1.89mm
USD 102.50
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ID: 40947410 pcs
thumb image of 1.4ct Diamond-Cut Multicolor Sapphire (ID: 409474)
1.42ct Sapphire
3.08 x 2.03mm
USD 49.70
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ID: 40207215 pcs
thumb image of 1.7ct Diamond-Cut Pink Red Ruby (ID: 402072)
1.74ct Ruby
2.93 x 1.60mm
USD 241.69
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ID: 38553320 pcs
thumb image of 2.5ct Diamond-Cut Golden Green Demantoid Garnet (ID: 385533)
2.50ct Demantoid Garnet
3.01 x 2.14mm
USD 174.25
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ID: 40207715 pcs
thumb image of 2ct Diamond-Cut Pink Red Ruby (ID: 402077)
1.96ct Ruby
3.09 x 1.90mm
USD 272.24
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ID: 40947110 pcs
thumb image of 1.4ct Diamond-Cut Multicolor Sapphire (ID: 409471)
1.42ct Sapphire
3.04 x 2.12mm
USD 49.70
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ID: 40896210 pcs
thumb image of 1.1ct Diamond-Cut Multicolor Sapphire (ID: 408962)
1.12ct Sapphire
2.93 x 2.05mm
USD 39.20
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ID: 38583810 pcs
thumb image of 1.4ct Diamond-Cut Golden Green Demantoid Garnet (ID: 385838)
1.40ct Demantoid Garnet
3.06 x 2.09mm
USD 97.48
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ID: 40214910 pcs
thumb image of 1.4ct Diamond-Cut Pink Red Ruby (ID: 402149)
1.44ct Ruby
2.96 x 2.10mm
USD 200.02
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ID: 40207315 pcs
thumb image of 1.8ct Diamond-Cut Pink Red Ruby (ID: 402073)
1.84ct Ruby
2.89 x 1.67mm
USD 255.58
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ID: 38068310 pcs
thumb image of 1.3ct Diamond-Cut Green Tsavorite Garnet (ID: 380683)
1.28ct Tsavorite Garnet
3.05 x 2.05mm
USD 117.54
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ID: 38035720 pcs
thumb image of 2.4ct Diamond-Cut Green Tsavorite Garnet (ID: 380357)
2.38ct Tsavorite Garnet
3.05 x 2.07mm
USD 218.56
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ID: 40915310 pcs
thumb image of 1.2ct Diamond-Cut Pink Sapphire (ID: 409153)
1.23ct Sapphire
2.91 x 1.96mm
USD 55.35
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ID: 34485120 pcs
thumb image of 3.9ct Round Cabochon Pink Sapphire (ID: 344851)
3.87ct Sapphire
3.07 x 1.67mm
USD 194.43
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ID: 38515020 pcs
thumb image of 2.3ct Diamond-Cut Golden Green Demantoid Garnet (ID: 385150)
2.31ct Demantoid Garnet
2.92 x 2.08mm
USD 160.94
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ID: 38028820 pcs
thumb image of 2.4ct Diamond-Cut Green Tsavorite Garnet (ID: 380288)
2.36ct Tsavorite Garnet
2.90 x 1.98mm
USD 216.72
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ID: 40981610 pcs
thumb image of 1.5ct Diamond-Cut Pink Sapphire (ID: 409816)
1.49ct Sapphire
3.11 x 2.16mm
USD 38.50
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ID: 40214610 pcs
thumb image of 1.4ct Diamond-Cut Pink Red Ruby (ID: 402146)
1.43ct Ruby
2.95 x 2.17mm
USD 198.63
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ID: 42196520 pcs
thumb image of 2.2ct Diamond-Cut Multicolor Sapphire (ID: 421965)
2.24ct Sapphire
2.88 x 2.12mm
USD 67.20
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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