search
  • English speaking customer support only

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

    International:
    +66-39303404

  • Change Language
  • USD
Buy Customized Gemstone Lots

Buy Marquise Shape 20x10 mm Gems

Single

Pairs

Lots

Faceted

Cab

Gemtype Color Shape Weight Size Clarity Price Origin
You Selected (104): Marquise Shape 20x10 mm Gems Clear All
Sort By:
Click for Details
Compare
1 pc
Add to Cart
Blue-Green Amazonite Gem - 9.1ct Marquise Cabochon (ID: 491190)

Marquise Green Amazonite

9.1ct
19.8 x 10 mm
$ 20.18
Item in Stock
Click for Details
Compare
2 pcs
Add to Cart
Blue-Green Amazonite Gem - 9.2ct Marquise Cabochon (ID: 491739)

Marquise Green Amazonite

9.17 ct (total 18.33ctw)
20.1 x 10.3 mm
$ 40.69
Item in Stock
Click for Details
Compare
2 pcs
Add to Cart
Bi-Color Ruby in Fuchsite Gem - 5.1ct Marquise Slice (ID: 385555)

Marquise Bi-color Ruby in Fuchsite

5.10 ct (total 10.19ctw)
20.2 x 9.9 mm
$ 68.58
Item in Stock
Click for Details
Compare
2 pcs
Add to Cart
Bi-Color Ruby in Fuchsite Gem - 5.1ct Marquise Slice (ID: 385547)

Marquise Bi-color Ruby in Fuchsite

5.06 ct (total 10.12ctw)
19.2 x 9.8 mm
$ 68.11
Item in Stock
Click for Details
Compare
2 pcs
Add to Cart
Bi-Color Ruby in Fuchsite Gem - 4.9ct Marquise Slice (ID: 385551)

Marquise Bi-color Ruby in Fuchsite

4.89 ct (total 9.77ctw)
19.9 x 9.8 mm
$ 65.75
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Bi-Color Ruby in Fuchsite Gem - 4ct Marquise Slice (ID: 384747)

Marquise Bi-color Ruby in Fuchsite

4ct
20.8 x 10.3 mm
$ 27.25
Item in Stock
Click for Details
Compare
2 pcs
Add to Cart
Blue-Green Amazonite Gem - 9.4ct Marquise Cabochon (ID: 491742)

Marquise Green Amazonite

9.36 ct (total 18.71ctw)
19.8 x 10.2 mm
$ 41.54
Item in Stock
Click for Details
Compare
2 pcs
Add to Cart
Blue-Green Amazonite Gem - 9.9ct Marquise Cabochon (ID: 491602)

Marquise Green Amazonite

9.85 ct (total 19.69ctw)
19.9 x 10.2 mm
$ 43.71
Item in Stock
Click for Details
Compare
2 pcs
Add to Cart
Blue-Green Amazonite Gem - 9.3ct Marquise Cabochon (ID: 491749)

Marquise Green Amazonite

9.28 ct (total 18.56ctw)
20 x 10.2 mm
$ 41.20
Item in Stock
Click for Details
Compare
2 pcs
Add to Cart
Blue-Green Amazonite Gem - 6.4ct Marquise Cabochon (ID: 491736)

Marquise Green Amazonite

6.35 ct (total 12.69ctw)
20 x 9.9 mm
$ 28.17
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Bi-Color Ruby in Fuchsite Gem - 6.5ct Marquise Slice (ID: 385253)

Marquise Bi-color Ruby in Fuchsite

6.5ct
20.5 x 10.4 mm
$ 44.40
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Bi-Color Ruby in Fuchsite Gem - 5.8ct Marquise Slice (ID: 386412)

Marquise Bi-color Ruby in Fuchsite

5.8ct
19.6 x 10.2 mm
$ 38.96
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Blue-Green Amazonite Gem - 8.2ct Marquise Cabochon (ID: 492172)

Marquise Green Amazonite

8.2ct
20.1 x 10.2 mm
$ 18.05
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Bi-Color Ruby in Fuchsite Gem - 5.5ct Marquise Slice (ID: 386700)

Marquise Bi-color Ruby in Fuchsite

5.5ct
20.1 x 9.8 mm
$ 36.80
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Bi-Color Ruby in Fuchsite Gem - 5.3ct Marquise Slice (ID: 384742)

Marquise Bi-color Ruby in Fuchsite

5.3ct
20.4 x 9.8 mm
$ 35.93
Item in Stock
Click for Details
Compare
2 pcs
Add to Cart
Blue-Green Amazonite Gem - 9.1ct Marquise Cabochon (ID: 491748)

Marquise Green Amazonite

9.14 ct (total 18.28ctw)
20.1 x 10.3 mm
$ 40.58
Item in Stock
Click for Details
Compare
2 pcs
Add to Cart
Blue-Green Amazonite Gem - 9.2ct Marquise Cabochon (ID: 491599)

Marquise Green Amazonite

9.22 ct (total 18.43ctw)
20 x 10.3 mm
$ 40.91
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Bi-Color Ruby in Fuchsite Gem - 5ct Marquise Slice (ID: 386414)

Marquise Bi-color Ruby in Fuchsite

5ct
20 x 9.9 mm
$ 33.36
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Bi-Color Ruby in Fuchsite Gem - 5ct Marquise Slice (ID: 386510)

Marquise Bi-color Ruby in Fuchsite

5ct
20.3 x 9.8 mm
$ 33.36
Item in Stock
Click for Details
Compare
1 pc
Add to Cart
Blue-Green Amazonite Gem - 6.3ct Marquise Cabochon (ID: 491184)

Marquise Green Amazonite

6.3ct
20.1 x 10.2 mm
$ 13.94
Item in Stock
Click for Details
Compare
2 pcs
Add to Cart
Blue-Green Amazonite Gem - 8.6ct Marquise Cabochon (ID: 491594)

Marquise Green Amazonite

8.61 ct (total 17.21ctw)
19.9 x 10.3 mm
$ 38.21
Item in Stock
1 2 3 4 5
Marquise Shape 20x10 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 20 mm x 10 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 was very happy on the quality of the gemstones I recieved from GemSelect, I will deffinetly buy again.
Posted By Mckeg in January, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
Great, easy to use, efficient!
Posted By Olive in January, 2019
Source: Bizrate
Overall Rating -> 9 star ratings
Great selection. Love the many learning features like articles and gem information. Prices competitive for natural stones. I do miss not having a selection of lab-made stones, CZ’s, etc, which are useful when price and cost are factors.
Posted By Dirk in January, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
Website easy to navigate.
Posted By RaeRae in January, 2019
Source: Bizrate
Overall Rating -> 9 star ratings
I WOULD RECOMMEND GEM SELECT.
Posted By BO in January, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
As Always never disappointed in any gemstone I purchase from this site. I have never had a problem. Thank-You Gemselect for offering such a comprehensive variety . I will continue to order from this site.
Posted By Brian in January, 2019
Source: Bizrate
Popular Gemstones
All Gemstones (142)
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
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