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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (381): Round Shape 4 mm Gems Clear All
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ID: 2798949 pcs
thumb image of 2.2ct Round Facet Multicolor Andalusite (ID: 279894)
2.16 ct Andalusite
4 mm
$ 108.00
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ID: 3012956 pcs
thumb image of 2ct Round Cabochon Yellowish Green Chrysoberyl Cat's Eye (ID: 301295)
2.03 ct Chrysoberyl Cat's Eye
4.1 mm
$ 131.95
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ID: 2948084 pcs
thumb image of 1.7ct Round Cabochon Golden Green Chrysoberyl Cat's Eye (ID: 294808)
1.66 ct Chrysoberyl Cat's Eye
4 mm
$ 116.20
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ID: 3906448 pcs
thumb image of 2.8ct Round Facet Raspberry Red Rhodolite Garnet (ID: 390644)
2.75 ct Rhodolite Garnet
4.1 mm
$ 134.09
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ID: 2947764 pcs
thumb image of 1.7ct Round Cabochon Yellowish Green Chrysoberyl Cat's Eye (ID: 294776)
1.66 ct Chrysoberyl Cat's Eye
3.9 mm
$ 116.20
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ID: 4674175 pcs
thumb image of 2.2ct Round Cabochon Red Pyrope Garnet (ID: 467417)
2.15 ct Pyrope Garnet
4.1 mm
$ 15.05
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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: 2613044 pcs
thumb image of 1.5ct Round Facet Green Demantoid Garnet (ID: 261304)
1.46 ct Demantoid Garnet
4 mm
$ 145.64
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ID: 2947704 pcs
thumb image of 1.6ct Round Cabochon Golden Green Chrysoberyl Cat's Eye (ID: 294770)
1.55 ct Chrysoberyl Cat's Eye
3.9 mm
$ 108.50
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ID: 4683834 pcs
thumb image of 1.3ct Round Facet Blue Apatite (ID: 468383)
1.26 ct Apatite
4 mm
$ 37.80
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ID: 4685114 pcs
thumb image of 1ct Round Facet Violet Blue Tanzanite (ID: 468511)
1.04 ct Tanzanite
4.1 mm
$ 41.60
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ID: 2947994 pcs
thumb image of 1.5ct Round Cabochon Golden Green Chrysoberyl Cat's Eye (ID: 294799)
1.54 ct Chrysoberyl Cat's Eye
4.1 mm
$ 107.80
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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: 3908405 pcs
thumb image of 1.3ct Round Facet Multicolor Andalusite (ID: 390840)
1.34 ct Andalusite
4 mm
$ 65.58
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ID: 3221075 pcs
thumb image of 1.6ct Round Facet Green Demantoid Garnet (ID: 322107)
1.63 ct Demantoid Garnet
4 mm
$ 162.59
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ID: 4898694 pcs
thumb image of 1.5ct Diamond-Cut Blue Zircon (ID: 489869)
1.47 ct Zircon
4.1 mm
$ 17.64
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ID: 2948324 pcs
thumb image of 1.5ct Round Cabochon Golden Green Chrysoberyl Cat's Eye (ID: 294832)
1.48 ct Chrysoberyl Cat's Eye
3.9 mm
$ 103.60
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ID: 2948255 pcs
thumb image of 2.5ct Round Cabochon Golden Green Chrysoberyl Cat's Eye (ID: 294825)
2.53 ct Chrysoberyl Cat's Eye
4 mm
$ 177.10
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ID: 4674605 pcs
thumb image of 2.1ct Round Cabochon Red Pyrope Garnet (ID: 467460)
2.13 ct Pyrope Garnet
4.1 mm
$ 14.91
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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: 4179425 pcs
thumb image of 2.2ct Round Facet Red Orange Spessartite Garnet (ID: 417942)
2.18 ct Spessartite Garnet
3.9 mm
$ 67.58
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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