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You Selected (614): Round Shape 4 mm Gems Clear All
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ID: 31082812 pcs
thumb image of 3.1ct Round Facet Multicolor Andalusite (ID: 310828)
3.06ct Andalusite
4.01 x 2.38mm
USD 137.70
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ID: 3737725 pcs
thumb image of 1.9ct Round Facet Purple Pink Sapphire (ID: 373772)
1.86ct Sapphire
4.06 x 2.91mm
USD 275.76
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ID: 3908405 pcs
thumb image of 1.3ct Round Facet Multicolor Andalusite (ID: 390840)
1.34ct Andalusite
4.03 x 2.74mm
USD 65.58
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ID: 4410156 pcs
thumb image of 2ct Round Facet Pinkish Rose Rhodolite Garnet (ID: 441015)
1.97ct Rhodolite Garnet
4.12 x 2.58mm
USD 39.40
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ID: 4290152 pcs
thumb image of 0.4ct Round Facet Green Emerald (ID: 429015)
0.37ct Emerald
3.94 x 2.16mm
USD 144.30
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ID: 3681906 pcs
thumb image of 1.8ct Diamond-Cut Orange Spessartite Garnet (ID: 368190)
1.77ct Spessartite Garnet
3.84 x 2.67mm
USD 48.76
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ID: 4101478 pcs
thumb image of 2.6ct Round Cabochon Peach Orange Moonstone (ID: 410147)
2.64ct Moonstone
4.12 x 2.46mm
USD 5.28
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ID: 4151355 pcs
thumb image of 1.7ct Round Facet Raspberry Red Rhodolite Garnet (ID: 415135)
1.72ct Rhodolite Garnet
4.08 x 2.71mm
USD 34.40
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ID: 3448655 pcs
thumb image of 1.3ct Round Facet Golden Green Sphene (ID: 344865)
1.27ct Sphene
3.85 x 2.59mm
USD 38.10
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ID: 38103510 pcs
thumb image of 3.4ct Diamond-Cut Pink Red Ruby (ID: 381035)
3.43ct Ruby
4.01 x 2.80mm
USD 665.21
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ID: 26768010 pcs
thumb image of 3.9ct Round Cabochon Lively Green Peridot (ID: 267680)
3.88ct Peridot
4.08 x 2.42mm
USD 31.04
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ID: 3746814 pcs
thumb image of 1.1ct Diamond-Cut Multicolor Sapphire (ID: 374681)
1.06ct Sapphire
3.95 x 2.40mm
USD 39.12
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ID: 4444594 pcs
thumb image of 1.3ct Diamond-Cut White Sapphire (ID: 444459)
1.32ct Sapphire
4.13 x 2.58mm
USD 159.14
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ID: 39071410 pcs
thumb image of 3.8ct Round Facet Raspberry Red Rhodolite Garnet (ID: 390714)
3.75ct Rhodolite Garnet
4.05 x 2.98mm
USD 182.85
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ID: 3742825 pcs
thumb image of 1.7ct Diamond-Cut Multicolor Sapphire (ID: 374282)
1.66ct Sapphire
4.12 x 2.77mm
USD 61.27
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ID: 38558710 pcs
thumb image of 2.2ct Diamond-Cut Golden Green Demantoid Garnet (ID: 385587)
2.22ct Demantoid Garnet
3.84 x 2.67mm
USD 154.73
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ID: 2068779 pcs
thumb image of 2.4ct Round Facet Multicolor Andalusite (ID: 206877)
2.35ct Andalusite
4.11 x 2.40mm
USD 105.75
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ID: 4151284 pcs
thumb image of 1.6ct Round Facet Raspberry Red Rhodolite Garnet (ID: 415128)
1.59ct Rhodolite Garnet
4.11 x 3.00mm
USD 31.80
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ID: 2948255 pcs
thumb image of 2.5ct Round Cabochon Golden Green Chrysoberyl Cat's Eye (ID: 294825)
2.53ct Chrysoberyl Cat's Eye
4.04 x 2.93mm
USD 177.10
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ID: 3273745 pcs
thumb image of 1.9ct Round Cabochon Lively Green Peridot (ID: 327374)
1.85ct Peridot
4.04 x 2.38mm
USD 14.80
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ID: 3930484 pcs
thumb image of 1.5ct Round Facet Blue Sapphire (ID: 393048)
1.47ct Sapphire
4.11 x 2.87mm
USD 157.70
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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