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Buy Marquise Shape 18x9 mm Gems

(15)
Marquise Shape 18x9 mm Gems Weight Marquise Shape 18x9 mm Gems Size Marquise Shape 18x9 mm Gems Clarity Marquise Shape 18x9 mm Gems Price Marquise Shape 18x9 mm Gems Origin
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6.39ct Loose Amazonite | 6.39 ct Green Amazonite, 17.8 x 9.1 mm Marquise Cut From Madagascar, Photo A

6.39 ct Green Amazonite, 17.8 x 9.1 mm Marquise Cut From Madagascar

Natural Amazonite, Qty: 1 pc | 6.39 carat weight Amazonite

6.39ct1 Piece
$ 15.39
17.8 x 9.1 mm
Item Description
Stone Type: Loose Amazonite
Amazonite Weight: 6.39 ct Amazonite
Amazonite Shape: Marquise Cabochon Amazonite
Amazonite Size: 17.8 x 9.1 mm Amazonite
Amazonite Color: Cool Green Amazonite
Amazonite Clarity: Opaque Amazonite
Amazonite Origin: Madagascar Amazonite
Amazonite Treatment: Untreated
Amazonite Quantity: 1
Amazonite Certificate: GemSelect
Product Description:
View Details
Add to Cart
7.02ct Loose Amazonite | 7.02 ct Green Amazonite, 18.4 x 9.3 mm Marquise Cut From Madagascar, Photo A

7.02 ct Green Amazonite, 18.4 x 9.3 mm Marquise Cut From Madagascar

Natural Amazonite, Qty: 1 pc | 7.02 carat weight Amazonite

7.02ct1 Piece
$ 16.91
18.4 x 9.3 mm
Item Description
Stone Type: Loose Amazonite
Amazonite Weight: 7.02 ct Amazonite
Amazonite Shape: Marquise Cabochon Amazonite
Amazonite Size: 18.4 x 9.3 mm Amazonite
Amazonite Color: Medium-Dark Green Amazonite
Amazonite Clarity: Opaque Amazonite
Amazonite Origin: Madagascar Amazonite
Amazonite Treatment: Untreated
Amazonite Quantity: 1
Amazonite Certificate: GemSelect
Product Description:
View Details
Add to Cart
6.89ct Loose Amazonite | 6.89 ct Green Amazonite, 17.8 x 9.1 mm Marquise Cut From Madagascar, Photo A

6.89 ct Green Amazonite, 17.8 x 9.1 mm Marquise Cut From Madagascar

Natural Amazonite, Qty: 1 pc | 6.89 carat weight Amazonite

6.89ct1 Piece
$ 16.90
17.8 x 9.1 mm
Item Description
Stone Type: Loose Amazonite
Amazonite Weight: 6.89 ct Amazonite
Amazonite Shape: Marquise Cabochon Amazonite
Amazonite Size: 17.8 x 9.1 mm Amazonite
Amazonite Color: Pine Green Amazonite
Amazonite Clarity: Opaque Amazonite
Amazonite Origin: Madagascar Amazonite
Amazonite Treatment: Untreated
Amazonite Quantity: 1
Amazonite Certificate: GemSelect
Product Description:
View Details
Add to Cart
8.00ct Loose Amazonite | 8 ct Green Amazonite, 18.4 x 9.3 mm Marquise Cut From Madagascar, Photo A

8 ct Green Amazonite, 18.4 x 9.3 mm Marquise Cut From Madagascar

Natural Amazonite, Qty: 1 pc | 8.00 carat weight Amazonite

8.00ct1 Piece
$ 19.62
18.4 x 9.3 mm
Item Description
Stone Type: Loose Amazonite
Amazonite Weight: 8.00 ct Amazonite
Amazonite Shape: Marquise Cabochon Amazonite
Amazonite Size: 18.4 x 9.3 mm Amazonite
Amazonite Color: Medium-Dark Green Amazonite
Amazonite Clarity: Opaque Amazonite
Amazonite Origin: Madagascar Amazonite
Amazonite Treatment: Untreated
Amazonite Quantity: 1
Amazonite Certificate: GemSelect
Product Description:
View Details
Add to Cart
7.17ct Loose Amazonite | 7.17 ct Green Amazonite, 17.9 x 9.1 mm Marquise Cut From Madagascar, Photo A

7.17 ct Green Amazonite, 17.9 x 9.1 mm Marquise Cut From Madagascar

Natural Amazonite, Qty: 1 pc | 7.17 carat weight Amazonite

7.17ct1 Piece
$ 17.27
17.9 x 9.1 mm
Item Description
Stone Type: Loose Amazonite
Amazonite Weight: 7.17 ct Amazonite
Amazonite Shape: Marquise Cabochon Amazonite
Amazonite Size: 17.9 x 9.1 mm Amazonite
Amazonite Color: Pine Green Amazonite
Amazonite Clarity: Opaque Amazonite
Amazonite Origin: Madagascar Amazonite
Amazonite Treatment: Untreated
Amazonite Quantity: 1
Amazonite Certificate: GemSelect
Product Description:
View Details
Add to Cart
14.58ct Loose Amazonite | 14.58 ct Green Amazonite, 17.6 x 9.3 mm Marquise Cut From Madagascar, Photo A

14.58 ct Green Amazonite, 17.6 x 9.3 mm Marquise Cut From Madagascar

Natural Amazonite, Qty: 2 pcs | 14.58 carat weight Amazonite

14.58ct (total)2 Pieces
$ 11.66
17.6 x 9.3 mm
Item Description
Stone Type: Loose Amazonite
Amazonite Weight: 7.29 ct Amazonite
Amazonite Shape: Marquise Cabochon Amazonite
Amazonite Size: 17.6 x 9.3 mm Amazonite
Amazonite Color: Deep Green Amazonite
Amazonite Clarity: Opaque Amazonite
Amazonite Origin: Madagascar Amazonite
Amazonite Treatment: Untreated
Amazonite Quantity: 2
Amazonite Certificate: GemSelect
Product Description:
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Add to Cart
14.30ct Loose Amazonite | 14.3 ct Green Amazonite, 17.9 x 9.1 mm Marquise Cut From Madagascar, Photo A

14.3 ct Green Amazonite, 17.9 x 9.1 mm Marquise Cut From Madagascar

Natural Amazonite, Qty: 2 pcs | 14.30 carat weight Amazonite

14.30ct (total)2 Pieces
$ 11.44
17.9 x 9.1 mm
Item Description
Stone Type: Loose Amazonite
Amazonite Weight: 7.15 ct Amazonite
Amazonite Shape: Marquise Cabochon Amazonite
Amazonite Size: 17.9 x 9.1 mm Amazonite
Amazonite Color: Cool Green Amazonite
Amazonite Clarity: Opaque Amazonite
Amazonite Origin: Madagascar Amazonite
Amazonite Treatment: Untreated
Amazonite Quantity: 2
Amazonite Certificate: GemSelect
Product Description:
View Details
Add to Cart
7.90ct Loose Amazonite | 7.9 ct Green Amazonite, 18 x 9.1 mm Marquise Cut From Madagascar, Photo A

7.9 ct Green Amazonite, 18 x 9.1 mm Marquise Cut From Madagascar

Natural Amazonite, Qty: 1 pc | 7.90 carat weight Amazonite

7.90ct1 Piece
$ 19.38
18 x 9.1 mm
Item Description
Stone Type: Loose Amazonite
Amazonite Weight: 7.90 ct Amazonite
Amazonite Shape: Marquise Cabochon Amazonite
Amazonite Size: 18 x 9.1 mm Amazonite
Amazonite Color: Pine Green Amazonite
Amazonite Clarity: Opaque Amazonite
Amazonite Origin: Madagascar Amazonite
Amazonite Treatment: Untreated
Amazonite Quantity: 1
Amazonite Certificate: GemSelect
Product Description:
View Details
Add to Cart
6.10ct Loose Amazonite | 6.1 ct Green Amazonite, 17.6 x 9.1 mm Marquise Cut From Madagascar, Photo A

6.1 ct Green Amazonite, 17.6 x 9.1 mm Marquise Cut From Madagascar

Natural Amazonite, Qty: 1 pc | 6.10 carat weight Amazonite

6.10ct1 Piece
$ 14.70
17.6 x 9.1 mm
Item Description
Stone Type: Loose Amazonite
Amazonite Weight: 6.10 ct Amazonite
Amazonite Shape: Marquise Cabochon Amazonite
Amazonite Size: 17.6 x 9.1 mm Amazonite
Amazonite Color: Pine Green Amazonite
Amazonite Clarity: Opaque Amazonite
Amazonite Origin: Madagascar Amazonite
Amazonite Treatment: Untreated
Amazonite Quantity: 1
Amazonite Certificate: GemSelect
Product Description:
View Details
Add to Cart
13.98ct Loose Amazonite | 13.98 ct Green Amazonite, 17.9 x 9.1 mm Marquise Cut From Madagascar, Photo A

13.98 ct Green Amazonite, 17.9 x 9.1 mm Marquise Cut From Madagascar

Natural Amazonite, Qty: 2 pcs | 13.98 carat weight Amazonite

13.98ct (total)2 Pieces
$ 11.18
17.9 x 9.1 mm
Item Description
Stone Type: Loose Amazonite
Amazonite Weight: 6.99 ct Amazonite
Amazonite Shape: Marquise Cabochon Amazonite
Amazonite Size: 17.9 x 9.1 mm Amazonite
Amazonite Color: Pine Green Amazonite
Amazonite Clarity: Opaque Amazonite
Amazonite Origin: Madagascar Amazonite
Amazonite Treatment: Untreated
Amazonite Quantity: 2
Amazonite Certificate: GemSelect
Product Description:
View Details
Add to Cart
14.56ct Loose Amazonite | 14.56 ct Green Amazonite, 18.3 x 9.2 mm Marquise Cut From Madagascar, Photo A

14.56 ct Green Amazonite, 18.3 x 9.2 mm Marquise Cut From Madagascar

Natural Amazonite, Qty: 2 pcs | 14.56 carat weight Amazonite

14.56ct (total)2 Pieces
$ 11.65
18.3 x 9.2 mm
Item Description
Stone Type: Loose Amazonite
Amazonite Weight: 7.28 ct Amazonite
Amazonite Shape: Marquise Cabochon Amazonite
Amazonite Size: 18.3 x 9.2 mm Amazonite
Amazonite Color: Medium-Dark Green Amazonite
Amazonite Clarity: Opaque Amazonite
Amazonite Origin: Madagascar Amazonite
Amazonite Treatment: Untreated
Amazonite Quantity: 2
Amazonite Certificate: GemSelect
Product Description:
View Details
Add to Cart
7.10ct Loose Amazonite | 7.1 ct Green Amazonite, 18 x 9.3 mm Marquise Cut From Madagascar, Photo A

7.1 ct Green Amazonite, 18 x 9.3 mm Marquise Cut From Madagascar

Natural Amazonite, Qty: 1 pc | 7.10 carat weight Amazonite

7.10ct1 Piece
$ 17.41
18 x 9.3 mm
Item Description
Stone Type: Loose Amazonite
Amazonite Weight: 7.10 ct Amazonite
Amazonite Shape: Marquise Cabochon Amazonite
Amazonite Size: 18 x 9.3 mm Amazonite
Amazonite Color: Cool Green Amazonite
Amazonite Clarity: Opaque Amazonite
Amazonite Origin: Madagascar Amazonite
Amazonite Treatment: Untreated
Amazonite Quantity: 1
Amazonite Certificate: GemSelect
Product Description:
View Details
Add to Cart
14.15ct Loose Amazonite | 14.15 ct Green Amazonite, 18.2 x 9.3 mm Marquise Cut From Madagascar, Photo A

14.15 ct Green Amazonite, 18.2 x 9.3 mm Marquise Cut From Madagascar

Natural Amazonite, Qty: 2 pcs | 14.15 carat weight Amazonite

14.15ct (total)2 Pieces
$ 11.32
18.2 x 9.3 mm
Item Description
Stone Type: Loose Amazonite
Amazonite Weight: 7.08 ct Amazonite
Amazonite Shape: Marquise Cabochon Amazonite
Amazonite Size: 18.2 x 9.3 mm Amazonite
Amazonite Color: Medium Green Amazonite
Amazonite Clarity: Opaque Amazonite
Amazonite Origin: Madagascar Amazonite
Amazonite Treatment: Untreated
Amazonite Quantity: 2
Amazonite Certificate: GemSelect
Product Description:
View Details
Add to Cart
7.65ct Loose Amazonite | 7.65 ct Green Amazonite, 18.1 x 9.3 mm Marquise Cut From Madagascar, Photo A

7.65 ct Green Amazonite, 18.1 x 9.3 mm Marquise Cut From Madagascar

Natural Amazonite, Qty: 1 pc | 7.65 carat weight Amazonite

7.65ct1 Piece
$ 16.75
18.1 x 9.3 mm
Item Description
Stone Type: Loose Amazonite
Amazonite Weight: 7.65 ct Amazonite
Amazonite Shape: Marquise Cabochon Amazonite
Amazonite Size: 18.1 x 9.3 mm Amazonite
Amazonite Color: Pine Green Amazonite
Amazonite Clarity: Opaque Amazonite
Amazonite Origin: Madagascar Amazonite
Amazonite Treatment: Untreated
Amazonite Quantity: 1
Amazonite Certificate: GemSelect
Product Description:
View Details
Add to Cart
6.84ct Loose Amazonite | 6.84 ct Green Amazonite, 18.3 x 9.2 mm Marquise Cut From Madagascar, Photo A

6.84 ct Green Amazonite, 18.3 x 9.2 mm Marquise Cut From Madagascar

Natural Amazonite, Qty: 1 pc | 6.84 carat weight Amazonite

6.84ct1 Piece
$ 16.78
18.3 x 9.2 mm
Item Description
Stone Type: Loose Amazonite
Amazonite Weight: 6.84 ct Amazonite
Amazonite Shape: Marquise Cabochon Amazonite
Amazonite Size: 18.3 x 9.2 mm Amazonite
Amazonite Color: Medium-Dark Green Amazonite
Amazonite Clarity: Opaque Amazonite
Amazonite Origin: Madagascar Amazonite
Amazonite Treatment: Untreated
Amazonite Quantity: 1
Amazonite Certificate: GemSelect
Product Description:
View Details
Add to Cart

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 18 mm x 9 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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