Near "P": Faceting Design Diagram
Successful tips, details, and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Near P"0
Near "P" (B4.JRG)
By Jeff R. Graham
79.3% Light Return
Angles for R.I. = 1.56
81 facets + 16 facets on girdle = 97
2-fold, mirror-image symmetry
L/W = 1.345 T/W = 0.873 T/L = 0.649
P/W = 0.604 C/W = 0.192
H/W = (P+C)/W+0.02 = 0.816
P/H = 0.741 C/H = 0.235
Vol./W^3 = 0.438
Addition # 5 - 85.9% in R.I. 1.62 with no changes, 89.9% in 1.93... This design is L/W=1.33 for all practical purposes and works very well in lighter colored large material.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
Aquamarine Value, Price, and Jewelry Information
Emerald Value, Price, and Jewelry Information
Seven Famous Emeralds and Their Stories
Emerald Origins: History and Identification
Crystalline Quartz Buying Guide
How Does Vapor Deposition Create Mystic Topaz and Aqua Aura Quartz?
Spurrite Value, Price, and Jewelry Information
Lapidary Technology Through the Ages: Laps and Polish
When you join the IGS community, you get trusted diamond & gemstone information when you need it.
Get started with the International Gem Society’s free guide to gemstone identification. Join our weekly newsletter & get a free copy of the Gem ID Checklist!