Faceting Design Diagram: Spur – Zircon – Hyacinth, Starlite


Zircon (Hyacinth, Starlite)

Spur (ZIRCON15.JRG)
By Jeff R. Graham
Copyright 1998
85% Light Return
Angles for R.I. = 1.98
85 facets + 12 facets on girdle = 97
6-fold, mirror-image symmetry
96 index
L/W = 1.065 T/W = 0.514 T/L = 0.483
P/W = 0.400 C/W = 0.193
H/W = (P+C)/W+0.02 = 0.613
P/H = 0.653 C/H = 0.315
Vol./W^3 = 0.244

Addition # 3 – This design cuts medium easy the crown meet can be a little hard. Cut in good medium color (I like honey) Zircon. It has nice sparkle to it because of the P5 & C4 tiers, 1-12cts.

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.