Featuring a New Introduction by John Higgs! âCosmic Trigger deals with a process of deliberately induced brain change. This process is called âinitiationâ or âvision questâ in many traditional societies and can loosely be considered some dangerous variety of self-psychotherapy in modern terminology.
The tools used by gemologists for the identification and grading of different gemstones range from the simple and familiar to the high-tech and exotic.Most gemstones can be identified by a few basic tools that every gemologist should have at hand.nother required tool for gemologists is the refractometer. A small drop of liquid with a high refractive index (RI) is placed on a glass cylinder in the top of the refractometer and illuminated from a separate light source (sometimes white light, but a monochromatic light source provides better accuracy).
Prices listed are retail. Wholesale is generally one third of retail. High-end gems are often marked up 30% or less, while low-priced more âcommercial qualityâ gems are often marked up considerably more. The price your gem will sell for is based upon several factors. Quality is one of the most important factors in valuing a gem.