Faceting a gemstone-cutting YAG

Описание

This video shows the steps in cutting and polishing a faceted gemstone. Im cutting YAG in this video. Yittrum Aluminum Garnet.
The critical angle of YAG is 33 degrees. YAG cuts like natural garnet, with polishing being performed with alumina or diamond (50,000 or 100,000 grit) on common polishing laps. YAG has low heat sensitivity. Production for the gem trade decreased after the introduction of synthetic cubic zirconia; as of 1995 there was little production.

Hardness: 8.5
Specific Gravity: 4.55 - 4.60; may vary with dopants used.
Cleavage / Fracture: None / Conchoidal fracture
Refractive Index / Birefringence: 1.833
Dispersion: 0.028