Image: <bdi><a href="https://www.wikidata.org/wiki/Q56247090" class="extiw" title="d:Q56247090"><span title="mineral collector and dealer">Robert M. Lavinsky</span></a></bdi> (CC BY-SA 3.0)
trigonaluncommonHydroxides
Brucite
Mg(OH)₂
The image displays a specimen of brucite characterized by translucent, platy to foliated aggregates, exhibiting a pale greenish-white to yellowish hue and a somewhat pearly luster.
Brucite Physical Properties
Mohs Hardness
2.5Crystal System
trigonalLuster
vitreousStreak Color
whiteCleavage
perfect on {0001} (basal)Fracture
unevenSpecific Gravity
2.39Colors
white, pale green, blue, grey, brownTransparency
transparentType Locality
Wood's Chrome Mine (Wood's Mine), Texas, Little Britain Township, Lancaster County, Pennsylvania, USAMineral Group
HydroxidesUses
source of magnesium, fire retardant, industrial applications, collectorAssociated Minerals
serpentine, chromite, magnesite, dolomite, calciteRarity
uncommonGeological Context
Brucite typically forms in low-temperature hydrothermal veins within serpentinized dolomitic marbles and schists, and as an alteration product of periclase in contact metamorphic zones.
