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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (38): Square Shape 8x8 mm Gems Clear All
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ID: 4008641 pcs
thumb image of 2.7ct Princess-Cut Pink Rose Quartz (ID: 400864)
2.69ct Rose Quartz
8.32 x 8.05 x 6.24mm
USD 18.83
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ID: 4373601 pcs
thumb image of 2.9ct Princess-Cut Swiss Blue Topaz (ID: 437360)
2.94ct Topaz
7.95 x 7.77 x 5.22mm
USD 14.70
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ID: 4383241 pcs
thumb image of 2.8ct Square Facet Violet Amethyst (ID: 438324)
2.77ct Amethyst
8.11 x 8.11 x 5.83mm
USD 13.85
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ID: 4369291 pcs
thumb image of 3.1ct Princess-Cut Sky Blue Topaz (ID: 436929)
3.11ct Topaz
8.15 x 8.02 x 5.25mm
USD 15.55
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ID: 4362331 pcs
thumb image of 2.1ct Square Facet Yellow Golden Golden Beryl (ID: 436233)
2.11ct Golden Beryl
7.98 x 7.95 x 4.57mm
USD 42.20
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ID: 4369182 pcs
thumb image of 6.3ct Princess-Cut Sky Blue Topaz (ID: 436918)
6.32ct Topaz
7.90 x 7.88 x 5.28mm
USD 31.60
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ID: 4387501 pcs
thumb image of 2.6ct Square Facet Violet Amethyst (ID: 438750)
2.59ct Amethyst
8.15 x 8.08 x 5.69mm
USD 12.95
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ID: 4005271 pcs
thumb image of 3ct Square Facet Cinnamon Orange Hessonite Garnet (ID: 400527)
3.04ct Hessonite Garnet
7.93 x 7.92 x 5.17mm
USD 60.80
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ID: 4369192 pcs
thumb image of 6.4ct Princess-Cut Sky Blue Topaz (ID: 436919)
6.35ct Topaz
8.12 x 8.00 x 5.62mm
USD 31.75
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ID: 4387521 pcs
thumb image of 2.6ct Square Facet Violet Amethyst (ID: 438752)
2.56ct Amethyst
7.91 x 7.83 x 5.93mm
USD 12.80
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ID: 4388201 pcs
thumb image of 2.4ct Square Facet Violet Amethyst (ID: 438820)
2.37ct Amethyst
8.05 x 7.96 x 5.10mm
USD 11.85
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ID: 4387221 pcs
thumb image of 2.7ct Square Facet Violet Amethyst (ID: 438722)
2.65ct Amethyst
8.12 x 8.10 x 5.79mm
USD 13.25
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ID: 4362281 pcs
thumb image of 1.8ct Square Facet Yellow Golden Golden Beryl (ID: 436228)
1.76ct Golden Beryl
7.94 x 7.93 x 4.06mm
USD 35.20
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ID: 4369232 pcs
thumb image of 6.5ct Princess-Cut Sky Blue Topaz (ID: 436923)
6.48ct Topaz
8.21 x 8.00 x 5.59mm
USD 32.40
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ID: 4376151 pcs
thumb image of 2.9ct Princess-Cut Sky Blue Topaz (ID: 437615)
2.93ct Topaz
8.12 x 7.96 x 4.94mm
USD 14.65
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ID: 4369261 pcs
thumb image of 3.2ct Princess-Cut Sky Blue Topaz (ID: 436926)
3.24ct Topaz
8.21 x 8.20 x 5.23mm
USD 16.20
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ID: 4346811 pcs
thumb image of 2.4ct Square Buff-Top Yellow Golden Citrine (ID: 434681)
2.41ct Citrine
8.13 x 8.11 x 4.99mm
USD 14.46
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ID: 4384521 pcs
thumb image of 2.7ct Square Facet Violet Amethyst (ID: 438452)
2.70ct Amethyst
8.13 x 8.09 x 5.63mm
USD 13.50
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ID: 4172311 pcs
thumb image of 2.5ct Square Facet Pink Rose Tourmaline (ID: 417231)
2.50ct Tourmaline
7.99 x 7.95 x 5.05mm
USD 300.00
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ID: 3420811 pcs
thumb image of 4.5ct Square Cabochon Multicolor Green Malachite (ID: 342081)
4.51ct Malachite
8.14 x 7.93 x 6.33mm
USD 12.95
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ID: 4369271 pcs
thumb image of 3.2ct Princess-Cut Sky Blue Topaz (ID: 436927)
3.21ct Topaz
8.19 x 8.14 x 5.37mm
USD 16.05
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Square Shape 8x8 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 Square shapes, facet cut and cabochon gems available now in 8 mm x 8 mm 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 meant nor 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