Hasenfeld-Stein Gets FireMark Princess Cut Patent

(IDEX Online News) – DTC Sightholder Hasenfeld-Stein received a U.S. patent for their FireMark Princess Cut Diamond. 

U.S. Patent No. 8,181,482 protects FireMark’s characteristics that result in its brilliance and light return of 98 percent. 

“We’ve always said there is no other Princess diamond in the world like FireMark, and now, with the newly issued Patent, it’s somewhat humbling to think there won’t be another like it for a very long time to come,” said Vice President Hertz Hasenfeld.

FireMark is the first Princess diamond in the world that rivals an Ideal Round in brilliance and light return, the company claims. 

“After years of trial and error, we determined that the combination of a higher crown, smaller table and shallower depth dramatically impacts the diamond’s light performance,” explained Hasenfeld. A FireMark’s crown averages between 9.5 and 13.5 percent; the table is a maximum 68 percent (averaging 65 percent), and the depth is a maximum 70.9 percent (averaging 68 percent). 

Other characteristics that distinguish a FireMark are:

GIA “Excellent” in both polish and symmetry

GCAL “Excellent” in light performance

Minimum 95 percent light return (average 98 percent)

Maximum length and width ratio of 1.025

Chamfered corners that are invisible to the naked eye

Hasenfeld also expressed how important the patent is to the growing number of exclusive FireMark retail jewelers. “It protects our exclusive retailers against competitors making false claims, and it makes a strong statement that FireMark retailers are selling real value.”

FireMark Princess Cut Diamonds are available to independent retailers only. They are not available online or sold in major U.S. chains and mass merchandisers.