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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (226): Round Shape 3 mm Gems Clear All
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ID: 46896910 pcs
thumb image of 1.4ct Diamond-Cut Golden Green Demantoid Garnet (ID: 468969)
1.36 ct Demantoid Garnet
3 mm
$ 54.40
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ID: 4683154 pcs
thumb image of 0.5ct Round Facet Pink Tourmaline (ID: 468315)
0.45 ct Tourmaline
3.1 mm
$ 5.40
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ID: 4693734 pcs
thumb image of 0.6ct Round Facet Pink Tourmaline (ID: 469373)
0.56 ct Tourmaline
3.1 mm
$ 6.72
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ID: 4693765 pcs
thumb image of 0.6ct Round Facet Pink Tourmaline (ID: 469376)
0.56 ct Tourmaline
3 mm
$ 6.72
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ID: 4683176 pcs
thumb image of 0.6ct Round Facet Pink Tourmaline (ID: 468317)
0.57 ct Tourmaline
3 mm
$ 6.84
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ID: 4680785 pcs
thumb image of 0.7ct Round Cabochon Blue White Rainbow Moonstone (ID: 468078)
0.68 ct Rainbow Moonstone
3 mm
$ 6.80
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ID: 4682006 pcs
thumb image of 0.6ct Round Facet Pink Tourmaline (ID: 468200)
0.60 ct Tourmaline
3 mm
$ 7.20
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ID: 4682036 pcs
thumb image of 0.6ct Round Facet Pink Tourmaline (ID: 468203)
0.60 ct Tourmaline
2.9 mm
$ 7.20
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ID: 46788910 pcs
thumb image of 2ct Round Cabochon Red Almandine Garnet (ID: 467889)
1.96 ct Almandine Garnet
3 mm
$ 9.80
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ID: 34543120 pcs
thumb image of 3.8ct Round Cabochon Pink Sapphire (ID: 345431)
3.78 ct Sapphire
3.1 mm
$ 94.50
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ID: 4682026 pcs
thumb image of 0.6ct Round Facet Pink Tourmaline (ID: 468202)
0.64 ct Tourmaline
3 mm
$ 7.68
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ID: 4682046 pcs
thumb image of 0.7ct Round Facet Pink Tourmaline (ID: 468204)
0.65 ct Tourmaline
3.1 mm
$ 7.80
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ID: 4681457 pcs
thumb image of 0.7ct Round Facet Pink Tourmaline (ID: 468145)
0.72 ct Tourmaline
3 mm
$ 8.64
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ID: 4680436 pcs
thumb image of 0.7ct Round Cabochon Blue White Rainbow Moonstone (ID: 468043)
0.65 ct Rainbow Moonstone
2.9 mm
$ 6.50
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ID: 46779910 pcs
thumb image of 2ct Round Cabochon Red Almandine Garnet (ID: 467799)
2.01 ct Almandine Garnet
3.1 mm
$ 10.05
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ID: 38223630 pcs
thumb image of 3.8ct Diamond-Cut Multicolor Andalusite (ID: 382236)
3.81 ct Andalusite
3.1 mm
$ 152.90
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ID: 46789110 pcs
thumb image of 2.2ct Round Cabochon Red Almandine Garnet (ID: 467891)
2.19 ct Almandine Garnet
3.1 mm
$ 10.95
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ID: 4694009 pcs
thumb image of 1ct Round Facet Pink Tourmaline (ID: 469400)
0.99 ct Tourmaline
2.9 mm
$ 11.88
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ID: 46789410 pcs
thumb image of 2ct Round Cabochon Red Almandine Garnet (ID: 467894)
2.01 ct Almandine Garnet
3 mm
$ 10.05
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ID: 38232730 pcs
thumb image of 3.7ct Diamond-Cut Multicolor Andalusite (ID: 382327)
3.74 ct Andalusite
3.1 mm
$ 150.09
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ID: 38663610 pcs
thumb image of 1.3ct Diamond-Cut Golden Green Demantoid Garnet (ID: 386636)
1.26 ct Demantoid Garnet
3 mm
$ 87.94
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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