Faceting Design Diagram: A Star Sq. – Apatite – Yellow, Green, Neon, Blue


Apatite (Yellow, Green, Neon, Blue)

A Star Sq. (APAT3.JRG)
By Jeff R. Graham
Copyright 1998
81% Light Return
Angles for R.I. = 1.64
61 facets + 8 facets on girdle = 69
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.498 T/L = 0.498
P/W = 0.417 C/W = 0.176
H/W = (P+C)/W+0.02 = 0.614
P/H = 0.680 C/H = 0.288
Vol./W^3 = 0.221

Addition # 2 – This cuts easy, the C4 might have to be floated in, roughing in the table helps. Cut in about any good material, 1-12cts. This works well in Peridot as well as Topaz and Tourmaline. Cut in refractive indexes 1.62 to 2.14 (84.6%) with no changes.


Random – Cosine – ISO

Detailed faceting instructions by Jeff Graham available at The Rock Peddler