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You Selected (154): Octagon Shape 8x6 mm Gems Clear All
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ID: 3815094 pcs
thumb image of 8ct Octagon Facet Swiss Blue Topaz (ID: 381509)
8.03ct Topaz
7.99 x 6.03 x 4.26mm
USD 56.21
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ID: 3345752 pcs
thumb image of 4ct Octagon Facet Swiss Blue Topaz (ID: 334575)
3.96ct Topaz
8.00 x 6.04 x 4.02mm
USD 25.65
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ID: 3723254 pcs
thumb image of 8.4ct Octagon Facet Swiss Blue Topaz (ID: 372325)
8.43ct Topaz
7.98 x 5.97 x 4.29mm
USD 59.01
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ID: 3346874 pcs
thumb image of 8.1ct Octagon Facet Swiss Blue Topaz (ID: 334687)
8.08ct Topaz
8.17 x 6.16 x 3.99mm
USD 52.35
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ID: 3723014 pcs
thumb image of 7.3ct Octagon Facet Swiss Blue Topaz (ID: 372301)
7.34ct Topaz
7.92 x 5.93 x 3.99mm
USD 51.38
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ID: 3723064 pcs
thumb image of 7.7ct Octagon Facet Swiss Blue Topaz (ID: 372306)
7.71ct Topaz
8.08 x 6.02 x 3.89mm
USD 53.97
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ID: 3723484 pcs
thumb image of 8.3ct Octagon Facet Swiss Blue Topaz (ID: 372348)
8.33ct Topaz
8.14 x 6.13 x 4.30mm
USD 58.31
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ID: 3722964 pcs
thumb image of 7.7ct Octagon Facet Swiss Blue Topaz (ID: 372296)
7.74ct Topaz
8.15 x 6.14 x 3.76mm
USD 54.18
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ID: 3722994 pcs
thumb image of 7.8ct Octagon Facet Swiss Blue Topaz (ID: 372299)
7.78ct Topaz
8.15 x 6.16 x 3.91mm
USD 54.46
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ID: 3673572 pcs
thumb image of 4ct Octagon Facet Swiss Blue Topaz (ID: 367357)
3.98ct Topaz
8.15 x 6.07 x 4.28mm
USD 25.35
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ID: 3723244 pcs
thumb image of 8.5ct Octagon Facet Swiss Blue Topaz (ID: 372324)
8.49ct Topaz
8.12 x 6.09 x 4.18mm
USD 59.43
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ID: 44433844 pcs
thumb image of 1.2ct Octagon Facet Yellow Golden Citrine (ID: 444338)
1.15ct Citrine
7.76 x 6.00 x 4.01mm
USD 5.75
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ID: 4287551 pcs
thumb image of 1.8ct Octagon Facet Rose Pink Tourmaline (ID: 428755)
1.76ct Tourmaline
8.15 x 6.10 x 4.41mm
USD 176.00
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ID: 3866644 pcs
thumb image of 5.3ct Octagon Facet Yellow Golden Citrine (ID: 386664)
5.33ct Citrine
7.99 x 6.06 x 3.91mm
USD 26.65
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ID: 3724254 pcs
thumb image of 7.5ct Octagon Facet Swiss Blue Topaz (ID: 372425)
7.53ct Topaz
8.06 x 6.07 x 3.83mm
USD 52.71
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ID: 3722814 pcs
thumb image of 7.3ct Octagon Facet Swiss Blue Topaz (ID: 372281)
7.31ct Topaz
8.03 x 6.03 x 3.68mm
USD 51.17
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ID: 3723514 pcs
thumb image of 7.5ct Octagon Facet Swiss Blue Topaz (ID: 372351)
7.45ct Topaz
8.03 x 6.01 x 3.87mm
USD 52.15
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ID: 3723794 pcs
thumb image of 8.7ct Octagon Facet Swiss Blue Topaz (ID: 372379)
8.72ct Topaz
8.11 x 6.09 x 4.47mm
USD 61.04
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ID: 4315331 pcs
thumb image of 2.5ct Octagon Facet Cinnamon Orange Hessonite Garnet (ID: 431533)
2.50ct Hessonite Garnet
8.00 x 6.17 x 4.74mm
USD 45.00
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ID: 3722754 pcs
thumb image of 8.4ct Octagon Facet Swiss Blue Topaz (ID: 372275)
8.36ct Topaz
8.11 x 6.11 x 4.09mm
USD 58.52
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ID: 3654682 pcs
thumb image of 3.9ct Octagon Facet Swiss Blue Topaz (ID: 365468)
3.86ct Topaz
8.09 x 6.10 x 3.94mm
USD 21.42
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Octagon Shape 8x6 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 Octagon Shape / Emerald-cut, faceted and cabochon gems available now in 8 x 6 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 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 round shape settings will allow 0.3 mm or slightly higher even. This small variance can usually be accommodated for most 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