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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (63): Marquise Shape 16x8 mm Gems Clear All
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4 pcs
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thumb image of 11.4ct Marquise Slice Bi-Color Ruby in Fuchsite (ID: 386580)
11.44 ctw Ruby in Fuchsite
16 x 7.8 mm
$ 77.11
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1 pc
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thumb image of 5.8ct Marquise Cabochon Multicolor Ruby-Zoisite (ID: 291432)
5.81 ct Ruby-Zoisite
16.2 x 8 mm
$ 15.98
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2 pcs
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thumb image of 6.5ct Marquise Slice Bi-Color Ruby in Fuchsite (ID: 386407)
6.45 ctw Ruby in Fuchsite
16 x 7.8 mm
$ 43.47
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1 pc
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thumb image of 4.5ct Marquise Facet Swiss Blue Topaz (ID: 399693)
4.47 ct Topaz
15.9 x 8 mm
$ 31.29
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2 pcs
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thumb image of 8.9ct Marquise Facet Swiss Blue Topaz (ID: 385343)
8.87 ctw Topaz
15.9 x 7.9 mm
$ 62.09
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1 pc
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thumb image of 4.3ct Marquise Facet Swiss Blue Topaz (ID: 385093)
4.33 ct Topaz
16.1 x 8 mm
$ 30.31
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1 pc
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thumb image of 4.5ct Marquise Facet Swiss Blue Topaz (ID: 385118)
4.49 ct Topaz
16 x 8 mm
$ 31.43
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1 pc
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thumb image of 4.6ct Marquise Facet Swiss Blue Topaz (ID: 399621)
4.62 ct Topaz
16.1 x 8.1 mm
$ 32.34
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2 pcs
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thumb image of 8.6ct Marquise Facet Swiss Blue Topaz (ID: 385178)
8.57 ctw Topaz
16.1 x 8 mm
$ 59.99
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1 pc
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thumb image of 4.5ct Marquise Facet Swiss Blue Topaz (ID: 385109)
4.51 ct Topaz
16 x 8 mm
$ 31.57
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1 pc
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thumb image of 4ct Marquise Facet Swiss Blue Topaz (ID: 399755)
4.02 ct Topaz
16 x 8.2 mm
$ 28.14
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1 pc
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thumb image of 4.4ct Marquise Facet Swiss Blue Topaz (ID: 399385)
4.36 ct Topaz
16.1 x 8.1 mm
$ 30.52
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2 pcs
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thumb image of 8.2ct Marquise Facet Swiss Blue Topaz (ID: 385294)
8.16 ctw Topaz
15.8 x 7.9 mm
$ 57.12
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2 pcs
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thumb image of 8.3ct Marquise Facet Swiss Blue Topaz (ID: 399692)
8.27 ctw Topaz
16 x 8 mm
$ 57.89
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1 pc
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thumb image of 4.3ct Marquise Facet Swiss Blue Topaz (ID: 385087)
4.33 ct Topaz
15.9 x 8 mm
$ 30.31
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2 pcs
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thumb image of 8.6ct Marquise Facet Swiss Blue Topaz (ID: 399745)
8.57 ctw Topaz
15.9 x 7.9 mm
$ 59.99
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2 pcs
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thumb image of 8.8ct Marquise Facet Swiss Blue Topaz (ID: 399381)
8.80 ctw Topaz
15.9 x 8 mm
$ 61.60
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2 pcs
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thumb image of 8.9ct Marquise Facet Swiss Blue Topaz (ID: 385339)
8.85 ctw Topaz
16 x 8.1 mm
$ 61.95
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2 pcs
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thumb image of 8.8ct Marquise Facet Swiss Blue Topaz (ID: 385286)
8.80 ctw Topaz
16 x 8 mm
$ 61.60
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1 pc
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thumb image of 4.3ct Marquise Facet Swiss Blue Topaz (ID: 399617)
4.33 ct Topaz
15.9 x 7.9 mm
$ 30.31
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1 pc
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thumb image of 4.3ct Marquise Facet Swiss Blue Topaz (ID: 385113)
4.31 ct Topaz
15.9 x 8.2 mm
$ 30.17
Item in Stock
1 2 3
Marquise Shape 16x8 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 16 mm x 8 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.

Certified Customer Reviews
Overall Rating -> 10 star ratings
Happy about the experience of the store, a lot of stone urge very nice
Posted By Ginger22 in April, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
Great products, reasonably priced, always a great shopping experience
Posted By Cas Brown in April, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
good all is very good
Posted By Arocas in April, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
Ease of selection- guarantee- honesty
Posted By Curt in April, 2018
Source: Bizrate
Overall Rating -> 8 star ratings
when I need a colored stone I check gem select. a trusted supplier for at least 10 years for me. many of the online sites have gone black but gemselect continues to satisfy me. oh sure there are many windowed and poorly cut stones here so paying some attention is critical. remember these are not custom cut stones but rather cut by old methods and the aim is to keep weight up at the expense of optical perfection. remember that colored stones are about color as the first consideration. I just wish gemselect offered rough for those who want to cut it.
Posted By Bis in April, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
Wow, great site with clear, concise information that is provided in a very user-friendly interface. I feel lucky to have found this given I am about ready to ask my dream girl to marry me. Thanks!
Posted By JJ in April, 2018
Source: Bizrate
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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