Chemical Formula

Be3Al2Si6O18

Hardness (Mohs)

7.5-8

Crystal System

Hexagonal

Streak

White

Luster

Vitreous

Diaphaneity

Transparent to translucent

Color

Colorless, white, green (emerald), blue (aquamarine), yellow (heliodor), pink (morganite), red (bixbite/red beryl)

Crystal Habit / Mode of Occurrence

Prismatic, often long and columnar crystals; massive, granular