Chemical Formula

BaCO₃

Hardness (Mohs)

3.0 - 3.5

Crystal System

Orthorhombic

Streak

White

Luster

Vitreous to resinous on fractures.

Diaphaneity

Transparent to translucent

Color

Colorless, white, pale gray, and can have tints of pale-yellow, pale-brown, or pale-green.

Crystal Habit / Mode of Occurrence

Typically occurs as striated short prismatic crystals, also botryoidal to spherical, columnar, fibrous, granular, and massive. Twinning on {110} is common.