• English speaking customer support only

    Toll Free - USA & Canada only:
    1-800-464-1640

    International:
    +66-39303404

  • Change Language
  • USD
Shop By

Single

By Piece

Pairs

Lots

Faceted

Cab

Gemtype Color Shape Weight Size Clarity Price Origin
You Selected (70): Marquise Shape 16x8 mm Gems Clear All
Sort By:
Click for Details
Compare
4 pcs
Add to Cart
2.9ct Marquise Slice Bi-Color Ruby in Fuchsite Gem (ID: 386580)
2.86 ct (total 11.44ctw) Ruby in Fuchsite
16 x 7.8 mm
$ 77.11
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
4.3ct Marquise Facet Swiss Blue Topaz Gem (ID: 399617)
4.33 ct Topaz
15.9 x 7.9 mm
$ 30.31
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
4.2ct Marquise Slice Bi-Color Ruby in Fuchsite Gem (ID: 386501)
4.16 ct Ruby in Fuchsite
16.6 x 8.2 mm
$ 28.04
Item in Stock
Click for Details
Compare
2 pcs
Add to Cart
3.2ct Marquise Slice Bi-Color Ruby in Fuchsite Gem (ID: 386407)
3.23 ct (total 6.45ctw) Ruby in Fuchsite
16 x 7.8 mm
$ 43.47
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
3.6ct Marquise Slice Bi-Color Ruby in Fuchsite Gem (ID: 386749)
3.62 ct Ruby in Fuchsite
15.7 x 8.3 mm
$ 24.40
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
5.8ct Marquise Cabochon Multicolor Ruby-Zoisite Gem (ID: 291432)
5.81 ct Ruby-Zoisite
16.2 x 8 mm
$ 15.98
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
5ct Marquise Cabochon Colorless Golden Rutile Quartz Gem (ID: 436171)
4.99 ct Rutile Quartz
16.3 x 7.9 mm
$ 12.28
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
4.4ct Marquise Facet Swiss Blue Topaz Gem (ID: 399752)
4.40 ct Topaz
16.1 x 8.1 mm
$ 30.80
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
4.4ct Marquise Facet Swiss Blue Topaz Gem (ID: 399385)
4.36 ct Topaz
16.1 x 8.1 mm
$ 30.52
Item in Stock
Click for Details
Compare
2 pcs
Add to Cart
4.3ct Marquise Facet Swiss Blue Topaz Gem (ID: 399556)
4.28 ct (total 8.56ctw) Topaz
15.9 x 8 mm
$ 59.92
Item in Stock
Click for Details
Compare
2 pcs
Add to Cart
4ct Marquise Facet Swiss Blue Topaz Gem (ID: 399384)
3.97 ct (total 7.94ctw) Topaz
15.5 x 7.9 mm
$ 55.58
Item in Stock
Click for Details
Compare
2 pcs
Add to Cart
3.3ct Marquise Facet Swiss Blue Topaz Gem (ID: 399609)
3.27 ct (total 6.53ctw) Topaz
15.6 x 7.9 mm
$ 45.71
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
4.9ct Marquise Facet Swiss Blue Topaz Gem (ID: 385126)
4.89 ct Topaz
16.1 x 8.1 mm
$ 34.23
Item in Stock
Click for Details
Compare
2 pcs
Add to Cart
Click for Product Video (385403)
4.4ct Marquise Facet Swiss Blue Topaz Gem (ID: 385403)
4.44 ct (total 8.87ctw) Topaz
16 x 8 mm
$ 62.09
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
4.4ct Marquise Facet Swiss Blue Topaz Gem (ID: 385097)
4.41 ct Topaz
16 x 8 mm
$ 30.87
Item in Stock
Click for Details
Compare
2 pcs
Add to Cart
4ct Marquise Facet Swiss Blue Topaz Gem (ID: 385291)
3.97 ct (total 7.93ctw) Topaz
16 x 8 mm
$ 55.51
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
4.3ct Marquise Facet Swiss Blue Topaz Gem (ID: 385102)
4.31 ct Topaz
16 x 8 mm
$ 30.17
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
3.9ct Marquise Facet Violet Amethyst Gem (ID: 352662)
3.94 ct Amethyst
16.5 x 7.9 mm
$ 27.58
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
4.7ct Marquise Facet Swiss Blue Topaz Gem (ID: 399566)
4.68 ct Topaz
15.9 x 8 mm
$ 32.76
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
3.9ct Marquise Facet Swiss Blue Topaz Gem (ID: 399750)
3.89 ct Topaz
15.6 x 7.9 mm
$ 27.23
Item in Stock
Click for Details
Compare
2 pcs
Add to Cart
4.1ct Marquise Facet Swiss Blue Topaz Gem (ID: 399692)
4.14 ct (total 8.27ctw) Topaz
16 x 8 mm
$ 57.89
Item in Stock
1 2 3 4
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
I have been using GemSelect for at lest five years and I have no complaints!
Posted By in October, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
This site always has beautiful stones to choose from and you will get the actual gem that is pictured. The shipping is fast and reasonably priced.
Posted By CAC in October, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
I have not gotten my gems, but when i do i will be very happy, yet i did not like you had to pay $15 extra for faster shipping
Posted By Jack in October, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
I love GemSelect, personally. I browse their site almost daily to see all the new stones available. Their selection is pretty amazing. The quality isn't always the highest and the cut of the stones isn't always perfect. But for the price, and if you look hard enough, you can find a real gem, so to speak.
Posted By Patrick in September, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
I would recommend to a friend because of the quality of the products purchased. The gemstone quality is very high and the gems purchased are beautiful. Any friends interested in having custom jewelry made would definitely be recommended to the site. Also, every shipment is handled with care and I am very pleased with that.
Posted By Isaiah in September, 2018
Source: Bizrate
Overall Rating -> 9 star ratings
Gem Select has an excellent selection of gemstones, including some rare ones. Prices are as expected.
Posted By Mike in September, 2018
Source: Bizrate
Popular Gemstones
All Gemstones (141)
A B C D E F G H I J K L M O P Q R S T V Z
English speaking customer support only

Toll Free - USA & Canada only:
1-800-464-1640

International:
+66-39303404

Save Money
No shipping Fees for Additional Items!
$6.99 Worldwide Shipping

Update Translation
 
Current Value
New Value

Creating Account...

Close window to continue

Facebook did not provide your email to login.

Please allow Facebook to provide your email or sign up an account with GemSelect.

GemSelect Gemstones
X Close Window
Colored Gemstones
X Close Window
Colored Gemstones
X Close Window
Colored Gemstones
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