6-Star: Faceting Design Diagram

Detailed information and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "6- Star"


Quartz (Amethyst, Citrine, Ametrine, Smokey, Rose)

6-Star (QTZ11.JRG)
By Jeff R. Graham
Copyright 1993
72% Light Return
Angles for R.I. = 1.54
79 facets + 12 facets on girdle = 91
6-fold, mirror-image symmetry
96 index
L/W = 1.036 T/W = 0.474 T/L = 0.457
P/W = 0.462 C/W = 0.209
H/W = (P+C)/W+0.02 = 0.691
P/H = 0.668 C/H = 0.303
Vol./W^3 = 0.254

Addition # 1 - This design has a lot of sparkle and flash that looks a lot like a star in a star. It makes a nice stone in any size, light to medium-dark material. The ray trace is misleading, the only light loss is around the C1 facets, 1ct+. Cut in refractive indexes 1.54 to 1.93(84.9%) wit no changes.

Random - Cosine - ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler

Jeff R. Graham

The late Jeff Graham was a prolific faceter, creator of many original faceting designs, and the author of several highly-regarded instructional faceting books such as Gram Faceting Designs.

Never Stop Learning

When you join the IGS community, you get trusted diamond & gemstone information when you need it.

Become a Member

Get Gemology Insights

Get started with the International Gem Society’s free guide to gemstone identification. Join our weekly newsletter & get a free copy of the Gem ID Checklist!