| Home | Rough | Bargains | 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 | Topaz | Tourmaline | Quartz | Zircon |
| Beginner's Page | New Stuff | Odds & Ends | Specials | Parcels | Synthetics |
| Cut Gemstones | Gemological Information | Gemstone Pricing Guides | How to buy Gemstones |
Quartz (Amethyst, Citrine, Ametrine, Smokey, Rose)
Strip "O" (QTZ41.JRG)
By Jeff R. Graham
Copyright 1995
74% Light Return
Angles for R.I. = 1.54
59 facets + 12 facets on girdle = 71
2-fold, mirror-image symmetry
96 index
L/W = 1.200 T/W = 0.614 T/L = 0.512
P/W = 0.485 C/W = 0.236
H/W = (P+C)/W+0.02 = 0.741
P/H = 0.655 C/H = 0.318
Vol./W^3 = 0.343Gram Book 1 - This oval is nice to cut, but it is a lot of work, like most ovals. The P11 facets are not center point and should be cut until they are parallel to each other. Cut it in any light to medium material, 1-12cts. Cut in refractive index 1.54 to 1.93 (80.6%) with no changes.

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