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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (331): Round Shape 6.5 mm Gems Clear All
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ID: 4104274 pcs
thumb image of 4.5ct Round Cabochon Smoke Sillimanite Cat's Eye (ID: 410427)
4.54ct Sillimanite Cat's Eye
6.40 x 3.27mm
USD 16.43
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ID: 4203642 pcs
thumb image of 2.4ct Round Facet Violet Blue Tanzanite (ID: 420364)
2.35ct Tanzanite
6.52 x 4.18mm
USD 282.00
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ID: 3780981 pcs
thumb image of 2ct Round Facet White Zircon (ID: 378098)
1.96ct Zircon
6.74 x 4.56mm
USD 52.65
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ID: 3803412 pcs
thumb image of 2.2ct Diamond-Cut White Zircon (ID: 380341)
2.21ct Zircon
6.28 x 3.48mm
USD 35.80
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ID: 4375011 pcs
thumb image of 1.1ct Diamond-Cut Orange Zircon (ID: 437501)
1.07ct Zircon
6.50 x 4.60mm
USD 21.40
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ID: 4375021 pcs
thumb image of 1.7ct Diamond-Cut Golden Zircon (ID: 437502)
1.66ct Zircon
6.53 x 4.80mm
USD 33.20
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ID: 4384631 pcs
thumb image of 1.4ct Diamond-Cut Orange Zircon (ID: 438463)
1.36ct Zircon
6.39 x 4.19mm
USD 27.20
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ID: 3821101 pcs
thumb image of 1.3ct Round Facet Raspberry Red Rhodolite Garnet (ID: 382110)
1.34ct Rhodolite Garnet
6.30 x 4.05mm
USD 57.14
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ID: 4475451 pcs
thumb image of 2ct Round Facet Blue Zircon (ID: 447545)
1.96ct Zircon
6.42 x 4.75mm
USD 88.20
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ID: 3686784 pcs
thumb image of 5.6ct Round Cabochon Green Prehnite (ID: 368678)
5.60ct Prehnite
6.44 x 4.12mm
USD 27.55
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ID: 3680892 pcs
thumb image of 3.1ct Round Cabochon Green Prehnite (ID: 368089)
3.09ct Prehnite
6.50 x 4.77mm
USD 15.33
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ID: 4054632 pcs
thumb image of 2.9ct Diamond-Cut White Zircon (ID: 405463)
2.92ct Zircon
6.42 x 4.30mm
USD 72.21
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ID: 4475711 pcs
thumb image of 1.9ct Round Facet Blue Zircon (ID: 447571)
1.88ct Zircon
6.43 x 4.80mm
USD 84.60
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ID: 3861201 pcs
thumb image of 1.8ct Diamond-Cut White Zircon (ID: 386120)
1.76ct Zircon
6.61 x 5.14mm
USD 43.37
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ID: 4195661 pcs
thumb image of 1.2ct Round Facet Pink Tourmaline (ID: 419566)
1.19ct Tourmaline
6.52 x 4.34mm
USD 59.50
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ID: 4345491 pcs
thumb image of 1.7ct Diamond-Cut Orange Zircon (ID: 434549)
1.70ct Zircon
6.65 x 4.82mm
USD 34.00
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ID: 3685874 pcs
thumb image of 5.7ct Round Cabochon Green Prehnite (ID: 368587)
5.65ct Prehnite
6.34 x 4.53mm
USD 27.80
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ID: 4203122 pcs
thumb image of 1.9ct Round Facet Violet Blue Tanzanite (ID: 420312)
1.88ct Tanzanite
6.37 x 3.72mm
USD 225.60
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ID: 4386841 pcs
thumb image of 1.5ct Diamond-Cut Golden Orange Zircon (ID: 438684)
1.47ct Zircon
6.39 x 4.50mm
USD 29.40
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ID: 4297531 pcs
thumb image of 1.4ct Round Facet Rose Pink Zircon (ID: 429753)
1.44ct Zircon
6.57 x 3.19mm
USD 28.80
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ID: 4369441 pcs
thumb image of 1.5ct Diamond-Cut Golden Orange Zircon (ID: 436944)
1.46ct Zircon
6.48 x 4.41mm
USD 29.20
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Round Shape 6.5 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 6.5 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