Faceting Design Diagram: Simply Simple – Peridot – Olivine, Green, apple green to yellow green


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

Simply Simple (PDOT4.JRG) Tourmaline cut by Tony Carson
By Jeff R. Graham
Copyright 1994
89.6% Light Return
Angles for R.I. = 1.67
20 facets + 4 facets on girdle = 24
4-fold symmetry
96 index
L/W = 1.000 P/W = 0.415 C/W = 0.159
H/W = (P+C)/W+0.02 = 0.595
P/H = 0.698 C/H = 0.268
Vol./W^3 = 0.235

Addition # 2 – A nice quick no-brain required to cut design. This works very well for thin pieces of material. As the stone gets larger a table is a good idea, cut to meet C2, C3. I have a lot of Peridot that seems to come out of the ground in layers, this design works well for that shape. I use this in pendants and earrings, 1/2-4cts. Cut in refractive indexes 1.67 to 2.14 (89.3%) 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.