MARQUISE DIAMOND

The marquise cut diamond is a football-shaped, modified brilliant-cut. The name is derived from the Marquise of Pompadour, for whom King Louis XIV of France allegedly had a stone fashioned to resemble what he considered her perfectly shaped mouth. Because the marquise diamond is long and narrow, it can also create the illusion of greater size. Carat for carat, the marquise diamond has one of the largest crown surface areas of any diamond shape, making it a good choice when trying to maximize the perceived size of a diamond. Like the oval diamond, the marquise cut diamond's elongated shape can make the finger of the wearer appear longer and slimmer.

Marquise cut diamonds posses some degree of bow-tie, varying from near invisible to severe. The visibility of a bow-tie effect cannot be ascertained by reviewing the diamond certificate or dimensions, but only upon visual inspection. If you are interested in purchasing a marquise cut diamond, but would like to have it inspected first, please contact a diamond consultant, who can review diamonds on your behalf. Chat online, or call 1-888-658-6372 during store hours.

Personal preference should dictate how narrow or fat of a marquise diamond you choose, although a length to width ratio of 1.75 -2.15 is considered the classic marquise cut. Every Lumera Diamond includes precise measurements, as well as the length to width ratio, so you know the exact shape of the marquise cut diamond you are considering.

Symmetry is very important in marquise cuts. The two end points should align with each other, and the right and left sides should form a near mirror image. Even a slight misalignment in the points can result in an off kilter look in the final setting. For this reason, excellent or very good symmetry is strongly recommended.

A marquise diamond should always be set with v-shaped prongs to protect the two points (the most likely location for chipping). Because these points were once nearest the outer edge of the rough stone, flaws such as naturals, extra facets, and other inclusions may be located here. Since the points are covered by prongs, these flaws will be invisible once the diamond is set. The only remaining concern would be if the flaws are significant enough to affect the stability of the diamond (this is extremely rare, however).

The chart below serves as a general guideline for evaluating the cut of a marquise diamond.

MARQUISE DIAMOND - CUT GUIDE

	EXCELLENT	VERY GOOD	GOOD	FAIR	POOR
Table %	53 - 63	52 or 64 - 65	51 or 66 - 68	50 or 69 - 70	< 50 or > 70
Depth %	58 - 62	56 - 57.9 or 62.1 - 66	53 - 55.9 or 66.1 - 71	50 - 52.9 or 71.1 - 74	< 50 or > 74
Girdle	Very Thin - Slightly Thick		Very Thin to Thick	Very Thin to Very Thick	Ex. Thin to Ex. Thick
Culet	None	Very Small	Small	Medium	> Medium
L/W Ratio	1.85 - 2.00	1.75 - 1.84 or 2.01 - 2.15	1.65 - 1.74 or 2.16 - 2.30	1.55 - 1.64 or 2.31 - 2.45	> 1.55 or < 2.45

Evaluating color in a marquise cut diamond is subjective. Keep in mind that many buyers may actually prefer the ever so slightly warmer colors of a G-H diamond over the cool colorlessness of a D-F diamond. In fact, most of the premium in price associated with a marquise cut diamond at the higher end of the color scale is driven by supply and demand; customers want the D-F color grades, and are willing to pay a premium to get them. In a world without diamond color grading, the price premium for higher grades would be much lower, as the actual differences in color are difficult to perceive.

In larger marquise diamonds (over 1 carat), the color may appear slightly darker at the points. For this reason, buyers may choose to move up one color grade as compared to other diamond shapes. The color chart below provides a general guide for evaluating color in marquise diamonds.

MARQUISE DIAMOND - COLOR GUIDE

	EXCELLENT	VERY GOOD	GOOD	FAIR	POOR
< .50 ct.	D - G	H - I	J - K	L - M	> M
.51-1.0 ct.	D - F	G	H - I	J - K	> K
1.0-2.0 ct.	D - F		G - H	I - J	> J
> 2.0 ct.	D - F		G	H - I	> I
Fluoro	None	Faint - Med	Strong	Very Strong

Like color, evaluating clarity in marquise diamonds is subjective. GIA provides excellent help with their clarity grades. Still, it is important to understand that each customer will have a unique standard for clarity. Some may be perfectly comfortable with an inclusion as long as they cannot easily see it. Others may insist on a more technically flawless appearance. The clarity chart below provides a general guide for evaluating color in marquise diamonds.

MARQUISE DIAMOND - CLARITY GUIDE

	EXCELLENT	VERY GOOD	GOOD	FAIR	POOR
< .50 ct.	FL - VS2	SI1 - SI2	I1	I2	> I2
.51-1.0 ct.	FL - VS1	VS2 - SI1	SI2	I1 - I2	> I2
1.0-2.0 ct.	FL - VVS2	VS1 - VS2	SI1 - SI2	I1	> I1
> 2.0 ct.	FL - VVS2	VS1 - VS2	SI1	SI2	> SI2

Questions about shape or other aspects of a diamond? Ask a diamond consultant for answers. A consultant will answer any questions you have, and if you like, search for diamonds on your behalf that match your criteria. Chat online, or call 1-888-658-6372 during store hours.

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