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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (99): Marquise Shape 12x6 mm Gems Clear All
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ID: 4327562 pcs
4.99ctw Topaz
12.12 x 6.14 x 4.73mm
USD 24.95
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ID: 4327492 pcs
4.07ctw Topaz
12.12 x 6.16 x 4.15mm
USD 20.35
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ID: 4022621 pcs
2.14ct Ruby
12.26 x 5.84 x 3.42mm
USD 2568.00
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ID: 4327512 pcs
4.56ctw Topaz
12.01 x 5.99 x 4.26mm
USD 22.80
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ID: 4366731 pcs
2.06ct Rutile Quartz
12.11 x 6.23 x 3.90mm
USD 5.07
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ID: 4324952 pcs
4.12ctw Topaz
12.05 x 6.08 x 4.08mm
USD 20.60
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ID: 4329002 pcs
4.82ctw Topaz
12.13 x 6.13 x 4.55mm
USD 24.10
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ID: 4059231 pcs
2.06ct Topaz
12.07 x 6.07 x 4.24mm
USD 14.36
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ID: 4330351 pcs
2.37ct Topaz
12.13 x 6.16 x 4.36mm
USD 11.85
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ID: 4330361 pcs
2.55ct Topaz
12.05 x 6.14 x 4.87mm
USD 12.75
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ID: 4331731 pcs
2.56ct Topaz
12.05 x 6.06 x 4.74mm
USD 12.80
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ID: 4326722 pcs
4.86ctw Topaz
12.02 x 6.06 x 4.50mm
USD 24.30
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ID: 4329671 pcs
2.22ct Topaz
11.92 x 5.99 x 4.50mm
USD 11.10
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ID: 4360881 pcs
1.28ct Golden Beryl
12.10 x 5.84 x 2.95mm
USD 25.60
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ID: 4324992 pcs
4.15ctw Topaz
12.07 x 6.23 x 4.11mm
USD 20.75
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ID: 4327532 pcs
4.68ctw Topaz
12.14 x 6.09 x 4.47mm
USD 23.40
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ID: 4329701 pcs
2.19ct Topaz
11.93 x 5.97 x 3.94mm
USD 10.95
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ID: 4331671 pcs
2.46ct Topaz
12.25 x 6.14 x 4.45mm
USD 12.30
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ID: 4329641 pcs
2.22ct Topaz
11.92 x 6.18 x 4.46mm
USD 11.10
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ID: 4326702 pcs
4.56ctw Topaz
11.93 x 6.01 x 4.53mm
USD 22.80
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ID: 4329721 pcs
2.00ct Topaz
12.04 x 5.94 x 3.88mm
USD 10.00
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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