Faceting Design Diagram: Borderland – Quartz – Citrine, Amethyst, Ametrine, Smokey, Rose


Quartz (Amethyst, Citrine, Ametrine, Smokey, Rose)

Jeff Facet Design

Jeff Facet Design

Borderland (MIR64.JRG) Peach Tourmaline
By Jeff R. Graham
Copyright 2005
88.6% Light Return
Angles for R.I. = 1.54
26 facets + 5 facets on girdle = 31
5-fold, mirror-image symmetry
80 index
L/W = 1.051 T/W = 0.213 T/L = 0.203 P/W = 0.389
C/W = 0.238 H/W = (P+C)/W+0.02 = 0.646 P/H = 0.601 C/H = 0.368 Vol./W^3 = 0.200

Addition # 10 – Cut in refractive indexes 1.54 to 2.14 with no changes. This works best in a large stone and is a classic example of less is more. Give it a try in light to medium saturated material. Note: By varying C2 the star effect can be adjusted, there is no meet. On a small stone the table can be left off.

Jeff Facet Design

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.