BERYL

CLASS: Cyclosilicate . . . CHEMICAL FORMULA: Al2Be3 (SiO3)6 . . . CRYSTAL SYSTEM: Hexagonal
CRYSTAL FORM: hexagonal or dihexagonal prism, hexagonal or dihexagonal bipyramid
COLOR: colorless, white, green (EMERALD), blue (AQUAMARINE), yellow (HELIODOR), red (MORGANITE).
PHYSICAL PROPERTIES: very hard (7,5/8 Mohs), light (2,63/2,92 g/cm3), imperfect exfoliation according to the base, transparent/translucent/opaque, vitreous/waxy/greasy luster and insoluble in acids.
CURIOSITIES: relate to the empowerment of intuition