| Home | Rough | Equipment | Books | Online Designs | Just Ask Jeff | Order | News List | Contact Me | Links |
| Amethyst | Aquamarine | Beryl | Citrine | Emerald | Garnet | Opal | Peridot | Sapphire | Scapolite | Spinel | Sunstone | Synthetics | Topaz | Tourmaline | Quartz | Zircon |
| Bargains | Beginner's Page | Eclectic | New Stuff | Odds & Ends | Parcels | Specials |
| Cut Gemstones | Cutting Information | Pricing Guides | Buying Gemstones |
Quartz (Amethyst, Citrine, Ametrine, Smokey, Rose)
Diamonds Up (MIR3.JRG)
By Jeff R. Graham
Copyright 2004
92.9% Light Return
Angles for R.I. = 1.54
29 facets + 8 facets on girdle = 37
4-fold, mirror-image symmetry
96 index
L/W = 1.000 T/W = 0.304 T/L = 0.304
P/W = 0.435 C/W = 0.229
H/W = (P+C)/W+0.02 = 0.684
P/H = 0.635 C/H = 0.335
Vol./W^3 = 0.266Addition # 9 - Note: The corners do not cut to center point. This design is made so the corners can vary depending on rough. Just eyeball the P3(G) in until it looks right. This cuts fast and works well in any light to medium saturated material. Cut this in refractive index 1.54 to 2.14 with no changes.

Random - Cosine - ISO
| Home | Rough | Equipment | Books | Online Designs | Just Ask Jeff | Order | News List | Contact Me | Links |