Diamond Oval: Faceting Design Diagram
Detailed information and guide on Faceting Designs. Faceting Design Diagram by Jeff R. Graham that presents various cuts, this one is called "Diamond Oval".
Garnet (Pyrope, Rhodolite, Almandine, Spessartite, Grossular, Demantoid, Tsavorite)
Diamond Oval (GNETP40.JRG)
By Jeff R. Graham
90.3% Light Return
Angles for R.I. = 1.73
57 facets + 10 facets on girdle = 67
2-fold, mirror-image symmetry
L/W = 1.290 T/W = 0.557 T/L = 0.432
P/W = 0.406 C/W = 0.189
H/W = (P+C)/W+0.02 = 0.614
P/H = 0.660 C/H = 0.307
Vol./W^3 = 0.306
Addition # 2 - This cuts a little different. The P7 is a step that is cut into the finished shape. It can be cut in a different order, and is harder to cut than it might look. It works well in man-made Sapphire, Spinel, and YAG, 2-12cts.
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
What is the Best Lap for Polishing Sapphire?
Seven Famous Pearls and Their Histories
Opal Stones and Gems: Value, Price, and Jewelry Information
Seven Stunning but Delicate Engagement Ring Stones
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!