IGS Background

Texas Mirage: Faceting Design Diagram


Successful tips and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Texas Mirage".

By Jeff R. Graham, updated on

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

Texas Mirage (MIR28.JRG)
By Jeff R. Graham
Copyright 2004
94.3% Light Return
Angles for R.I. = 1.54
40 facets + 10 facets on girdle = 50
5-fold, mirror-image symmetry
80 index
L/W = 1.051 P/W = 0.435 C/W = 0.172
H/W = (P+C)/W+0.02 = 0.627
P/H = 0.693 C/H = 0.275
Vol./W^3 = 0.199

Addition # 9 - This works well in any material, but to see the star reflection a light to medium saturation works best. This is great for earrings and sets. I prefer it cut in a large stone so the star shows. Cut in refractive 1.54 to 2.14 with no changes.


Random - Cosine - ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler

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!