Murmur : 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 "Murmur"
Tourmaline (Achroite, Dravite, Rubellite, Indicolite, Verdelite, Siberite)
Murmur (MIR73.JRG)
By Jeff R. Graham
Copyright 2005
85.5% light Return
Angles for R.I. = 1.62
61 facets + 10 facets on girdle = 71
10-fold, mirror-image symmetry
80 index
L/W = 1.051 T/W = 0.262 T/L = 0.250 P/W = 0.426
C/W = 0.260 H/W = (P+C)/W+0.02 = 0.706 P/H = 0.603 C/H = 0.369 Vol./W^3 = 0.238
PAVILION
CROWN
Addition # 10 - Cut in refractive indexes 1.62 to 2.14 with no changes. This is pretty neat, it has a very flower-like look and is a different looking round. It is fun and fast to cut and works well in any light to medium colored material. I like Tourmaline.
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
Jeff R. Graham
The late Jeff Graham was a prolific faceter, creator of many original faceting designs, and the author of several highly-regarded instructional faceting books such as Gram Faceting Designs.
Related Articles
Tourmaline Gem, Price, and Jewelry Information
Rubellite Tourmaline Buying Guide
Buying Gemstones in Afghanistan: A Beginner’s Guide
Faceting Survey Results – Polishing – Tourmaline
Latest Articles
Serandite Value, Price, and Jewelry Information
A Beginner’s Guide To Common Gemstone Heat Treatments
Gemstone Radiation Treatment
Alternative Birthstones
Never Stop Learning
When you join the IGS community, you get trusted diamond & gemstone information when you need it.
Get Gemology Insights
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!