Star gems
Phenomenom, Asteriam and Chatoyancy. Orientation Techniques, Testing Fluids, Optical Shape. Cutting and Polishing Euipment Homemande, Manufactured, Laps, Tools, Useful Accessories. Cutting Methods, Diamond Sawing, Lapping. Polishing Methods, Mixing and Application of Polishing Agents. Tables, Mechanical, Weights and Measures
