Faceting Design Diagram: BP Star – Peridot – Olivine, Green, apple green to yellow green


Peridot (Olivine, Green, apple green to yellow green)

BP Star (PDOT6.JRG)
By Jeff R. Graham
Copyright 1995
83.6% Light Return
Angles for R.I. = 1.67
56 facets + 10 facets on girdle = 66
5-fold, mirror-image symmetry
80 index
L/W = 1.051 T/W = 0.570 T/L = 0.542
P/W = 0.449 C/W = 0.190
H/W = (P+C)/W+0.02 = 0.659
P/H = 0.681 C/H = 0.289
Vol./W^3 = 0.248

Addition # 3 – The C3 facets can be cut before the C2’s if you want to, otherwise this design cuts normally and you should not have any problems. It makes a very nice stone in any material, 1-8cts. Cut in refractive indexes 1.67 to 2.14 with no changes.


Random – Cosine – ISO

 

Detailed faceting instructions by Jeff Graham available at The Rock Peddler