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Roger Weller, geology instructor
Chemical Group: hydroxide
Chemical Formula: Mg(OH)2
Color: white, gray, green, or blue
Specific Gravity: 2.38 to 2.4
Tenacity: sectile Transparency: transparent to translucent
Cleavage: good basal cleavage
Brucite forms broad, tabular crystals.
It most commonly occurs as foliated masses.
When fibrous, fibers can be separated and are elastic.
Mineral Associations: serpentine, chlorite
Identifying Characteristics: harder than talc
Uses: an antacid
Occurrences: New York, Pennsylvania, Texas, California
Toxicity: when-swallowed- low when inhaled- moderate