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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (408): Round Shape 4 mm Gems Clear All
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ID: 4524001 pcs
thumb image of 0.3ct Round Facet Green/Pink Color-Change Diaspore (ID: 452400)
0.27 ct Color-Change Diaspore
4 mm
$ 9.45
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ID: 39071510 pcs
thumb image of 4ct Round Facet Raspberry Red Rhodolite Garnet (ID: 390715)
4.02 ct Rhodolite Garnet
4 mm
$ 196.02
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ID: 39071410 pcs
thumb image of 3.8ct Round Facet Raspberry Red Rhodolite Garnet (ID: 390714)
3.75 ct Rhodolite Garnet
4.1 mm
$ 182.85
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ID: 4689095 pcs
thumb image of 1.1ct Round Facet Violet Blue Tanzanite (ID: 468909)
1.09 ct Tanzanite
4 mm
$ 23.99
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ID: 4689824 pcs
thumb image of 1.1ct Round Facet Violet Blue Tanzanite (ID: 468982)
1.10 ct Tanzanite
4 mm
$ 24.21
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ID: 4672916 pcs
thumb image of 2.4ct Round Cabochon Red Pyrope Garnet (ID: 467291)
2.42 ct Pyrope Garnet
4 mm
$ 16.94
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ID: 4523282 pcs
thumb image of 0.7ct Round Facet Green/Pink Color-Change Diaspore (ID: 452328)
0.67 ct Color-Change Diaspore
3.9 mm
$ 23.45
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ID: 3463255 pcs
thumb image of 2ct Round Facet Golden Brown to Orange Color-Change Garnet (ID: 346325)
2.04 ct Color-Change Garnet
4 mm
$ 183.60
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ID: 31290010 pcs
thumb image of 2.5ct Round Facet Multicolor Andalusite (ID: 312900)
2.48 ct Andalusite
4 mm
$ 111.60
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ID: 2795859 pcs
thumb image of 2.3ct Round Facet Multicolor Andalusite (ID: 279585)
2.25 ct Andalusite
4.1 mm
$ 101.25
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ID: 4546025 pcs
thumb image of 1.6ct Round Facet Green/Pink Color-Change Diaspore (ID: 454602)
1.56 ct Color-Change Diaspore
4.1 mm
$ 49.92
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ID: 4152156 pcs
thumb image of 2ct Round Facet Raspberry Red Rhodolite Garnet (ID: 415215)
2.01 ct Rhodolite Garnet
4.1 mm
$ 40.20
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ID: 4689175 pcs
thumb image of 1.3ct Round Facet Violet Blue Tanzanite (ID: 468917)
1.32 ct Tanzanite
4 mm
$ 29.05
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ID: 4672965 pcs
thumb image of 2.1ct Round Cabochon Red Pyrope Garnet (ID: 467296)
2.13 ct Pyrope Garnet
4.1 mm
$ 14.91
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ID: 4367605 pcs
thumb image of 2ct Round Facet Orange Spessartite Garnet (ID: 436760)
1.95 ct Spessartite Garnet
3.9 mm
$ 58.50
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ID: 4545084 pcs
thumb image of 1.5ct Round Facet Green/Pink Color-Change Diaspore (ID: 454508)
1.45 ct Color-Change Diaspore
4.1 mm
$ 46.40
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ID: 2798989 pcs
thumb image of 2.2ct Round Facet Multicolor Andalusite (ID: 279898)
2.16 ct Andalusite
4.1 mm
$ 108.00
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ID: 4673714 pcs
thumb image of 1.6ct Round Cabochon Red Pyrope Garnet (ID: 467371)
1.60 ct Pyrope Garnet
4.1 mm
$ 11.20
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ID: 4689125 pcs
thumb image of 1.4ct Round Facet Violet Blue Tanzanite (ID: 468912)
1.44 ct Tanzanite
4 mm
$ 31.69
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ID: 4685144 pcs
thumb image of 0.9ct Round Facet Violet Blue Tanzanite (ID: 468514)
0.94 ct Tanzanite
4 mm
$ 37.60
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ID: 38195220 pcs
thumb image of 4ct Diamond-Cut Multicolor Andalusite (ID: 381952)
3.99 ct Andalusite
3.9 mm
$ 159.96
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Round Shape 4 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 4 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