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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (102): Marquise Shape 12x6 mm Gems Clear All
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ID: 4327472 pcs
4.94ctw Topaz
11.92mm x 6.08mm x 4.94mm
USD 24.70
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ID: 4328962 pcs
5.07ctw Topaz
12.12mm x 6.06mm x 4.77mm
USD 25.35
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ID: 4326712 pcs
4.45ctw Topaz
12.09mm x 6.11mm x 4.00mm
USD 22.25
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ID: 4330431 pcs
2.26ct Topaz
12.18mm x 6.00mm x 4.40mm
USD 11.30
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ID: 4324952 pcs
4.12ctw Topaz
12.05mm x 6.08mm x 4.08mm
USD 20.60
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ID: 4326632 pcs
4.86ctw Topaz
11.87mm x 6.14mm x 4.27mm
USD 24.30
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ID: 4327502 pcs
4.68ctw Topaz
12.06mm x 6.08mm x 4.26mm
USD 23.40
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ID: 4328912 pcs
4.65ctw Topaz
12.06mm x 6.01mm x 4.36mm
USD 23.25
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ID: 4329721 pcs
2.00ct Topaz
12.04mm x 5.94mm x 3.88mm
USD 10.00
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ID: 4329022 pcs
3.50ctw Topaz
12.21mm x 6.18mm x 3.49mm
USD 17.50
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ID: 4167462 pcs
3.57ctw Smoky Quartz
11.91mm x 6.07mm x 4.30mm
USD 5.36
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ID: 4167502 pcs
3.87ctw Smoky Quartz
12.06mm x 6.11mm x 4.73mm
USD 5.80
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ID: 4331741 pcs
1.81ct Topaz
11.75mm x 5.90mm x 3.50mm
USD 9.05
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ID: 4330401 pcs
2.35ct Topaz
12.11mm x 6.19mm x 4.02mm
USD 11.75
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ID: 4329661 pcs
2.89ct Topaz
12.09mm x 6.22mm x 4.97mm
USD 14.45
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ID: 4330421 pcs
2.09ct Topaz
12.07mm x 6.02mm x 4.17mm
USD 10.45
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ID: 4328972 pcs
4.93ctw Topaz
11.83mm x 6.02mm x 4.93mm
USD 24.65
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ID: 4331721 pcs
2.34ct Topaz
12.02mm x 6.13mm x 4.35mm
USD 11.70
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ID: 4329671 pcs
2.22ct Topaz
11.92mm x 5.99mm x 4.50mm
USD 11.10
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ID: 4331691 pcs
2.67ct Topaz
12.13mm x 6.17mm x 4.68mm
USD 13.35
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ID: 4326732 pcs
4.69ctw Topaz
12.20mm x 6.18mm x 4.38mm
USD 23.45
Item in Stock
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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