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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (212): Round Shape 3 mm Gems Clear All
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ID: 47386010 pcs
thumb image of 1.3ct Round Facet Green Chrome Diopside (ID: 473860)
1.25 ct Chrome Diopside
3 mm
$ 18.75
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ID: 46897910 pcs
thumb image of 1.4ct Diamond-Cut Golden Green Demantoid Garnet (ID: 468979)
1.40 ct Demantoid Garnet
3 mm
$ 56.00
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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: 46832010 pcs
thumb image of 0.9ct Round Facet Pink Tourmaline (ID: 468320)
0.94 ct Tourmaline
3 mm
$ 11.28
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ID: 46897310 pcs
thumb image of 1.6ct Diamond-Cut Golden Green Demantoid Garnet (ID: 468973)
1.55 ct Demantoid Garnet
3.1 mm
$ 62.00
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ID: 4681416 pcs
thumb image of 0.8ct Round Cabochon Blue White Rainbow Moonstone (ID: 468141)
0.81 ct Rainbow Moonstone
3 mm
$ 8.10
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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: 4680416 pcs
thumb image of 0.9ct Round Cabochon Blue White Rainbow Moonstone (ID: 468041)
0.86 ct Rainbow Moonstone
3 mm
$ 8.60
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ID: 46788610 pcs
thumb image of 2.1ct Round Cabochon Red Almandine Garnet (ID: 467886)
2.05 ct Almandine Garnet
3 mm
$ 10.25
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ID: 40210810 pcs
thumb image of 1.6ct Diamond-Cut Pink Red Ruby (ID: 402108)
1.59 ct Ruby
3.1 mm
$ 220.85
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ID: 46788410 pcs
thumb image of 2.1ct Round Cabochon Deep Red Almandine Garnet (ID: 467884)
2.06 ct Almandine Garnet
3.1 mm
$ 10.30
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ID: 46883510 pcs
thumb image of 1.7ct Diamond-Cut Golden Green Demantoid Garnet (ID: 468835)
1.66 ct Demantoid Garnet
3.1 mm
$ 66.40
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ID: 4681406 pcs
thumb image of 0.9ct Round Cabochon Blue White Rainbow Moonstone (ID: 468140)
0.87 ct Rainbow Moonstone
3 mm
$ 8.70
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ID: 4680396 pcs
thumb image of 0.9ct Round Cabochon Blue White Rainbow Moonstone (ID: 468039)
0.90 ct Rainbow Moonstone
2.9 mm
$ 9.00
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ID: 46788710 pcs
thumb image of 2.1ct Round Cabochon Red Almandine Garnet (ID: 467887)
2.09 ct Almandine Garnet
3.1 mm
$ 10.45
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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: 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: 46789010 pcs
thumb image of 1.9ct Round Cabochon Red Almandine Garnet (ID: 467890)
1.85 ct Almandine Garnet
3.1 mm
$ 9.25
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ID: 46882610 pcs
thumb image of 1.8ct Diamond-Cut Golden Green Demantoid Garnet (ID: 468826)
1.75 ct Demantoid Garnet
3.1 mm
$ 70.00
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ID: 4681136 pcs
thumb image of 1ct Round Cabochon Blue White Rainbow Moonstone (ID: 468113)
1.00 ct Rainbow Moonstone
3 mm
$ 10.00
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ID: 47385910 pcs
thumb image of 1.4ct Round Facet Green Chrome Diopside (ID: 473859)
1.35 ct Chrome Diopside
3.1 mm
$ 20.25
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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