Marquise Cut Diamonds

Marquise shape diamond

The marquise cut (aka “Navette” cut) is an elliptical shaped brilliant cut with pointed ends. The shape emerged in the 18th century, but many associate it with jewelry styles from the 1970s. We’ve seen renewed interest in marquise cuts. For example, marquise cuts set in east/west or horizontal orientations with diamond halos or simple bezel settings create a fresh contemporary look. Actresses Catherine Zeta-Jones, and Portia de Rossi both have east/west set marquise cut diamond engagement rings. Some prefer a vertical orientation, which elongates the finger.   Recommended length to width ratio for Marquise cuts is 1.75 to 2.25

**Visit Marquise Cut Diamond Prices for the latest retail diamond price statistics.

Special Characteristics of Marquise Cut Diamonds

Marquise cuts may show more color and inclusions than other brilliant cuts.  Inclusions may be easily seen in the center (belly) facets, which are larger than the pointed end facets where inclusions are easily hidden.  The pointed ends of this cut should be protected, as they can be prone to chipping.  Marquise cuts may have a prominent bow tie area.  A bow tie is a dark area across the center width of many fancy shapes—a result of varying pavilion angles.  Bow ties show as light return that is blocked by the head of the viewer.  Fancy shapes like Ovals, Marquises, Hearts, and Pears will have bow ties of varying degrees, and it is best to avoid excessively deep or shallow stones. Marquise cuts can be found in a wide array of proportions, and they are best judged in person or in photographs.

Size Matters

Marquise cuts generally look much larger from the “face up” position than other fancy shapes of the same carat weight.  It is not uncommon to find 1ct. Marquise cuts that are approximately 10mm long X 6mm wide—compared to round brilliants, which are generally 6.5mm in the 1ct. range.

Basic Marquise Cut Guidelines courtesy of http://www.gemappraisers.com

 

CUT CLASSES Class 1A Class 1B Class 2A Class 2B Class 3A Class 3B Class 4A Class 4B

Ideal cut

Premium cut

International fine trade cut

US domestic average cut

below average

Table %

55-60%

53-61.5%

52-62%

51-64%

51-67%

49-70%

48-72%

>72%
<48%

Crown Height %

12-15%

11.5-16%

11-16.6%

10.1-17.5%

9-18%

8.3-18.9%

7.8-19.5%

<7.8%
>19.5%

Girdle thickness
Word descriptions and percentages.

V. Thin to Sl. Thick
(0.4%-4.5%) or
Thin to Thick (1%-5.5%)

V.Thin to Thick(0.4%-5.5%)

Very Thin to Very Thick
(0.4% to 7.0%)

Extremely thin to
Extremely thick
(0.0% to >7.0%)

Total Depth %

59.0-63.0%

63.1-65.4%

56-68.5%

46-71%

43-73%

>73%
< 43%

Length:Width Ratios
Trade preferences.
A matter of personal taste and choice.

Pear 1.50-1.75
Marquise 1.75-2.25
Heart 0.98-1.02
Oval 1.33-1.66

1.26-1.99
1.51-2.49
1.24-0.91
1.26-1.74


> Class 3 < Class 3

Polish/Symmetry
Not a primary determining factor.

Excellent to Good

Good or Fair


Poor to Fair

CUT CLASSES Class 1A

Ideal cut

Table %

55-60%

Crown Height %

12-15%

Girdle thickness

Word descriptions and percentages.

V. Thin to Sl. Thick

(0.4%-4.5%) or

Thin to Thick (1%-5.5%)

Total Depth %

59.0-63.0%

Length:Width Ratios

Trade preferences.
A matter of personal taste and choice.

Pear 1.50-1.75

Marquise 1.75-2.25

Heart 0.98-1.02

Oval 1.33-1.66

Polish/Symmetry

Not a primary determining factor.

Excellent to Good

CUT CLASSES Class 1B

Premium cut

Table %

53-61.5%

Crown Height %

11.5-16%

Girdle thickness

Word descriptions and percentages.

V. Thin to Sl. Thick

(0.4%-4.5%) or

Thin to Thick (1%-5.5%)

Total Depth %

59.0-63.0%

Length:Width Ratios

Trade preferences.
A matter of personal taste and choice.

Pear 1.50-1.75

Marquise 1.75-2.25

Heart 0.98-1.02

Oval 1.33-1.66

Polish/Symmetry

Not a primary determining factor.

Excellent to Good

CUT CLASSES Class 2A

International fine trade cut

Table %

52-62%

Crown Height %

11-16.6%

Girdle thickness

Word descriptions and percentages.

V. Thin to Sl. Thick

(0.4%-4.5%) or

Thin to Thick (1%-5.5%)

Total Depth %

59.0-63.0%

Length:Width Ratios

Trade preferences.
A matter of personal taste and choice.

Pear 1.50-1.75

Marquise 1.75-2.25

Heart 0.98-1.02

Oval 1.33-1.66

Polish/Symmetry

Not a primary determining factor.

Excellent to Good

CUT CLASSES Class 2B

International fine trade cut

Table %

51-64%

Crown Height %

10.1-17.5%

Girdle thickness

Word descriptions and percentages.

V.Thin to Thick(0.4%-5.5%)

Total Depth %

63.1-65.4%

Length:Width Ratios

Trade preferences.
A matter of personal taste and choice.

Pear 1.50-1.75

Marquise 1.75-2.25

Heart 0.98-1.02

Oval 1.33-1.66

Polish/Symmetry

Not a primary determining factor.

Excellent to Good

CUT CLASSES Class 3A

US domestic average cut

Table %

51-67%

Crown Height %

9-18%

Girdle thickness

Word descriptions and percentages.

Very Thin to Very Thick

(0.4% to 7.0%)

Total Depth %

56-68.5%

Length:Width Ratios

Trade preferences.
A matter of personal taste and choice.

1.26-1.99

1.51-2.49

1.24-0.91

1.26-1.74

Polish/Symmetry

Not a primary determining factor.

Good or Fair

CUT CLASSES Class 3B

US domestic average cut

Table %

49-70%

Crown Height %

8.3-18.9%

Girdle thickness

Word descriptions and percentages.

Very Thin to Very Thick

(0.4% to 7.0%)

Total Depth %

46-71%

Length:Width Ratios

Trade preferences.
A matter of personal taste and choice.

1.26-1.99

1.51-2.49

1.24-0.91

1.26-1.74

Polish/Symmetry

Not a primary determining factor.

Good or Fair

CUT CLASSES Class 4A

below average

Table %

48-72%

Crown Height %

7.8-19.5%

Girdle thickness

Word descriptions and percentages.

Extremely thin to

Extremely thick

(0.0% to >7.0%)

Total Depth %

43-73%

Length:Width Ratios

Trade preferences.
A matter of personal taste and choice.

> Class 3 < Class 3

Polish/Symmetry

Not a primary determining factor.


Poor to Fair

CUT CLASSES Class 4B

below average

Table %

>72%

<48%

Crown Height %

<7.8%

>19.5%

Girdle thickness

Word descriptions and percentages.

Extremely thin to

Extremely thick

(0.0% to >7.0%)

Total Depth %

>73%

< 43%

Length:Width Ratios

Trade preferences.
A matter of personal taste and choice.

> Class 3 < Class 3

Polish/Symmetry

Not a primary determining factor.


Poor to Fair

Courtesy of D.S. Atlas, Accredited Gem Appraisers, © AGA 1998-2004

 

 

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Threads with pictures of Marquise Cuts

https://www.pricescope.com/forum/show-me-the-ring/some-estate-mostly-deco-rings-t52570.html

https://www.pricescope.com/forum/show-me-the-ring/some-estate-mostly-deco-rings-t77498.html

Threads discussing Marquise Cut Quality

https://www.pricescope.com/forum/show-me-the-ring/some-estate-mostly-deco-rings-t106514.html

https://www.pricescope.com/forum/show-me-the-ring/some-estate-mostly-deco-rings-t119138.html

 

 

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