Marquise Cut


Our Marquise Cut moissanite is infused with lab diamond, giving it the same durability as diamond. Pronounced “Mark-Keys”, Marquise cut diamonds and moissanite appear the largest of all cuts.  Due to the long nature of the Marquise shape, it is beloved for having a flattering, slenderising effect on the fingers when set in the traditional orientation of North-South. Also known as the “Navette” diamond meaning “little boat” in French, the Marquise Cut has a wealth of history dating back to the 18th century.

Our signature stone, the Ethica Diamond, is not a lab grown diamond but a lab grown stone that is precisely cut from premium grade silicone carbide (moissanite) with a diamond infusion.

Each stone is grown under strict conditions, cut by hand and fully faceted to exact diamond proportions, giving each stone incredible depth and sparkle, and independently certified by the GRI.

Ethica Diamonds are as standard:

  • E colour
  • VVS1 clarity
  • Excellent cut

Please enquire if you would like different specifications.

Looking to have this set with a lab grown diamond or coloured gemstone?

Find out more here.
Estimated Shipping Dates
Thu, Jan 5
Thu, Dec 22
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Legend says that the Marquise cut first appeared in Paris circa 1745 and its fascinating history can be traced back to the height of the French monarchy. King Louis XV commissioned his court jeweller to create a diamond that resembled the smile of his beautiful mistress, the Marchioness Madame de Pompadour. A sleek and seductive design, the perfect Marquise cut gemstone should always be cut in a 2:1 aspect ratio, meaning it must be twice as long as it is wide to have the proper aesthetic effect.

The sizes of Marquise Ethica Diamonds all have an aspect ratio of as close to 2 as possible, unless requested otherwise.

The stones shown on the model’s hand are for reference only. Actual carat weight availability may vary.

In the event that another jeweller sets your stone, the Lifetime Stone Guarantee will be void.

Please get in touch if you require more information here:  CONTACT US

To shop all Marquise Cut engagement rings, CLICK HERE.


Size (mm) Carat
8 x 4 0.50
10 x 5 1.00
12 x 6 2.00
14 x 7 3.00