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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (98): Marquise Shape 12x6 mm Gems Clear All
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ID: 4248571 pcs
thumb image of 2ct Marquise Facet Violet Blue Tanzanite (ID: 424857)
2.00ct Tanzanite
11.65 x 5.81 x 4.44mm
USD 360.00
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ID: 4327542 pcs
thumb image of 3.8ct Marquise Facet Swiss Blue Topaz (ID: 432754)
3.76ct Topaz
11.89 x 6.20 x 4.09mm
USD 18.80
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ID: 4329022 pcs
thumb image of 3.5ct Marquise Facet Swiss Blue Topaz (ID: 432902)
3.50ct Topaz
12.21 x 6.18 x 3.49mm
USD 17.50
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ID: 4364311 pcs
thumb image of 1.9ct Marquise Cabochon Colorless Golden Rutile Quartz (ID: 436431)
1.92ct Rutile Quartz
12.07 x 6.11 x 3.54mm
USD 4.72
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ID: 4329651 pcs
thumb image of 2.1ct Marquise Facet Swiss Blue Topaz (ID: 432965)
2.05ct Topaz
11.97 x 6.00 x 3.85mm
USD 10.25
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ID: 4329641 pcs
thumb image of 2.2ct Marquise Facet Swiss Blue Topaz (ID: 432964)
2.22ct Topaz
11.92 x 6.18 x 4.46mm
USD 11.10
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ID: 4331681 pcs
thumb image of 2.3ct Marquise Facet Swiss Blue Topaz (ID: 433168)
2.28ct Topaz
12.22 x 6.16 x 4.40mm
USD 11.40
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ID: 4331731 pcs
thumb image of 2.6ct Marquise Facet Swiss Blue Topaz (ID: 433173)
2.56ct Topaz
12.05 x 6.06 x 4.74mm
USD 12.80
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ID: 4331761 pcs
thumb image of 2.2ct Marquise Facet Swiss Blue Topaz (ID: 433176)
2.18ct Topaz
12.11 x 6.21 x 3.94mm
USD 10.90
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ID: 4330431 pcs
thumb image of 2.3ct Marquise Facet Swiss Blue Topaz (ID: 433043)
2.26ct Topaz
12.18 x 6.00 x 4.40mm
USD 11.30
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ID: 4327492 pcs
thumb image of 4.1ct Marquise Facet Swiss Blue Topaz (ID: 432749)
4.07ct Topaz
12.12 x 6.16 x 4.15mm
USD 20.35
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ID: 4058732 pcs
thumb image of 4.2ct Marquise Facet Swiss Blue Topaz (ID: 405873)
4.24ct Topaz
11.91 x 6.00 x 4.25mm
USD 29.55
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ID: 4328972 pcs
thumb image of 4.9ct Marquise Facet Swiss Blue Topaz (ID: 432897)
4.93ct Topaz
11.83 x 6.02 x 4.93mm
USD 24.65
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ID: 4327582 pcs
thumb image of 4.5ct Marquise Facet Swiss Blue Topaz (ID: 432758)
4.45ct Topaz
12.06 x 6.03 x 4.24mm
USD 22.25
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ID: 4366761 pcs
thumb image of 2.6ct Marquise Cabochon Colorless Golden Rutile Quartz (ID: 436676)
2.64ct Rutile Quartz
11.96 x 6.11 x 4.77mm
USD 6.49
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ID: 4326742 pcs
thumb image of 3.6ct Marquise Facet Swiss Blue Topaz (ID: 432674)
3.55ct Topaz
11.92 x 6.15 x 3.58mm
USD 17.75
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ID: 4366741 pcs
thumb image of 2.5ct Marquise Cabochon Colorless Golden Rutile Quartz (ID: 436674)
2.47ct Rutile Quartz
12.00 x 6.14 x 4.40mm
USD 6.08
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ID: 4331751 pcs
thumb image of 2.1ct Marquise Facet Swiss Blue Topaz (ID: 433175)
2.09ct Topaz
11.96 x 6.17 x 4.15mm
USD 10.45
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ID: 4329711 pcs
thumb image of 1.8ct Marquise Facet Swiss Blue Topaz (ID: 432971)
1.83ct Topaz
12.08 x 6.04 x 3.65mm
USD 9.15
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ID: 4327522 pcs
thumb image of 5.2ct Marquise Facet Swiss Blue Topaz (ID: 432752)
5.16ct Topaz
12.07 x 6.07 x 4.88mm
USD 25.80
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ID: 4327482 pcs
thumb image of 3.6ct Marquise Facet Swiss Blue Topaz (ID: 432748)
3.56ct Topaz
12.21 x 6.19 x 3.84mm
USD 17.80
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Marquise Shape 12x6 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 marquise shaped facet cut gems, gemstone carvings and cabochons available in 12 mm x 6 mm sizes. For the largest selection of colored gemstones, Shop GemSelect Online.

As a general guideline, when it comes to calibrated gems, they are not usually expected to be cut to exact measurements and specifications. But rather, they're cut with slight variance in size, though the close approximatation in size is not clearly defined, there are general guidelines for what is considered acceptable. Obviously larger and heavy carat weight stones allow more room in size for variance, while smaller stones may leave little to none. This means a large 30mm calibrated gemstone, could actually be closer to 31 millimeters. For this reason, we recommend to always view the exact size in addition to the calibrated size details. The exact size will inform you of the variance you can expect. Some setting styles are more flexible with variance, such as prong settings, while other styles of mountings may need almost an exact size to the fraction of millimeter.

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