Faceting Design Diagram: 3+ Pavilion – Zircon – Hyacinth, Starlite


Zircon (Hyacinth, Starlite)

3+ Pavilion (ZIRCON1.JRG)
By Jeff R. Graham
Copyright 1993
88% Light Return
Angles for R.I. = 1.93
61 facets + 8 facets on girdle = 69
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.322 T/L = 0.322
P/W = 0.420 C/W = 0.224
H/W = (P+C)/W+0.02 = 0.664
P/H = 0.632 C/H = 0.338
Vol./W^3 = 0.232

Addition # 2 – This design is good in light to med material, 1-4cts. I like it in yellow or blue, it is nice for earrings (1ct+), if you like them on the bigger side. Cut in refractive indexes 1.73 to 2.14 (83.4%) with no changes.


Random – Cosine – ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler

Gram Faceting Archive of Information
This edited version of an article by the late Jeff Graham is part of a special archived informational series from Gram Faceting. Used with permission.