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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (238): Round Shape 6.5 mm Gems Clear All
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ID: 3858882 pcs
thumb image of 3.3ct Diamond-Cut White Zircon (ID: 385888)
3.34 ct Zircon
6.6 mm
$ 82.30
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ID: 4588851 pcs
thumb image of 0.9ct Round Cabochon Green Prehnite (ID: 458885)
0.93 ct Prehnite
6.6 mm
$ 1.39
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ID: 4588881 pcs
thumb image of 1.1ct Round Cabochon Green Prehnite (ID: 458888)
1.12 ct Prehnite
6.6 mm
$ 1.67
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ID: 4203112 pcs
thumb image of 1.9ct Round Facet Violet Blue Tanzanite (ID: 420311)
1.87 ct Tanzanite
6.5 mm
$ 224.40
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ID: 4532261 pcs
thumb image of 1.2ct Round Facet Brownish Green Kornerupine (ID: 453226)
1.23 ct Kornerupine
6.5 mm
$ 104.55
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ID: 4203492 pcs
thumb image of 2.1ct Round Facet Violet Blue Tanzanite (ID: 420349)
2.08 ct Tanzanite
6.5 mm
$ 249.60
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ID: 4369421 pcs
thumb image of 1.4ct Diamond-Cut Golden Orange Zircon (ID: 436942)
1.43 ct Zircon
6.4 mm
$ 28.60
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ID: 4588811 pcs
thumb image of 1.2ct Round Cabochon Green Prehnite (ID: 458881)
1.16 ct Prehnite
6.3 mm
$ 1.73
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ID: 4329621 pcs
thumb image of 1.3ct Round Facet Cinnamon Orange Hessonite Garnet (ID: 432962)
1.28 ct Hessonite Garnet
6.4 mm
$ 16.38
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ID: 4329611 pcs
thumb image of 1.3ct Round Facet Cinnamon Orange Hessonite Garnet (ID: 432961)
1.30 ct Hessonite Garnet
6.5 mm
$ 16.64
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ID: 4323791 pcs
thumb image of 1.9ct Diamond-Cut Orange Zircon (ID: 432379)
1.93 ct Zircon
6.6 mm
$ 41.82
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ID: 4331831 pcs
thumb image of 1.3ct Round Facet Cinnamon Orange Hessonite Garnet (ID: 433183)
1.30 ct Hessonite Garnet
6.3 mm
$ 16.64
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ID: 3261394 pcs
thumb image of 5.9ct Round Facet Multicolor Malaya Garnet (ID: 326139)
5.87 ct Malaya Garnet
6.6 mm
$ 443.77
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ID: 3259314 pcs
thumb image of 4.8ct Round Facet Multicolor Malaya Garnet (ID: 325931)
4.82 ct Malaya Garnet
6.4 mm
$ 364.39
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ID: 4203202 pcs
thumb image of 2ct Round Facet Violet Blue Tanzanite (ID: 420320)
2.04 ct Tanzanite
6.6 mm
$ 244.80
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ID: 4203132 pcs
thumb image of 1.7ct Round Facet Violet Blue Tanzanite (ID: 420313)
1.74 ct Tanzanite
6.4 mm
$ 208.80
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ID: 3438181 pcs
thumb image of 1.2ct Round Facet Cinnamon Orange Hessonite Garnet (ID: 343818)
1.22 ct Hessonite Garnet
6.6 mm
$ 51.24
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ID: 4203152 pcs
thumb image of 2.1ct Round Facet Violet Blue Tanzanite (ID: 420315)
2.10 ct Tanzanite
6.5 mm
$ 252.00
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ID: 3926031 pcs
thumb image of 1ct Round Facet Green Apatite (ID: 392603)
1.01 ct Apatite
6.6 mm
$ 37.73
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ID: 4588211 pcs
thumb image of 1ct Diamond-Cut Champagne Diamond (ID: 458821)
1.01 ct Diamond
6.3 mm
$ 2153.23
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ID: 4333351 pcs
thumb image of 1.4ct Round Facet Cinnamon Orange Hessonite Garnet (ID: 433335)
1.42 ct Hessonite Garnet
6.4 mm
$ 18.18
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Round Shape 6.5 mm Gems
Some people buy 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 even slightly higher. 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