Red Block: Faceting Design Diagram
Successful tips, details and guide on Faceting Designs. Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Red Block"0
Garnet (Pyrope, Rhodolite, Almandine, Spessartite, Grossular, Demantoid, Tsavorite)
Red Block (MC15.JRG)
By Jeff R. Graham
87.6% Light Return
Angles for R.I. = 1.73
35 facets + 8 facets on girdle = 43
2-fold, mirror-image symmetry
L/W = 1.330 T/W = 1.047 T/L = 0.787
P/W = 0.464 C/W = 0.127
H/W = (P+C)/W+0.02 = 0.611
P/H = 0.759 C/H = 0.208
Vol./W^3 = 0.442
Addition # 4 - This can be cut in several different cutting orders, and is not an easy design (because of the keel). I think doing a 1.33 L/W preform is a good start. The P6 can be deeper or shallower depending on the rough, the C2 would have to change, light to medium material 2cts+. This is designed for yield, which is why the Pavilion is so deep, it will darken the finished stone. Cut this in R.I. 1.73 to 2.14 without changes.
Random - Cosine - ISO
Detailed faceting instructions by Jeff Graham available at The Rock Peddler
Garnet Value, Price, and Jewelry Information
How Do Garnets Form?
Top Spots for Gem Hunting in the US
Why are Topaz and Citrine Gemstones Misidentified?
Identifying Garnets Simplified
Staurolite Value, Price, and Jewelry Information
Amethyst Buying Guide
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!