Mica Grades Mica grades from V-1 to V-5 with V-1 being the highest quality. |
V-1 | Clear, hard, of uniform color, nearly flat, free from stains, foreign inclusions, cracks and other similar defects. |
V-2 | Clear and slightly stained. May contain slight crystallographic discoloration and very slight air inclusions in one fourth of the usable area. |
V-3 | Fair stained. Hard, of uniform color, may contain slight waves, slight crystallographic discoloration, and medium air inclusions in not more than one half of the usable area. |
V-4 | Good stained. Hard, of uniform color, may contain medium waves. Slight crystallographic discoloration and medium air inclusions in not more than two thirds of the usable area. |
V-5 | Stained A quality. Hard, may contain medium air inclusions, uniformly distributed in the usable area, slight green vegetable stains and medium waviness. |