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Lawsonite

#GJ42449
SOLD
Lawsonite from Reed Station, Tiburon Peninsula, Marin Co., California, United States - GJ42449
Lawsonite from Reed Station, Tiburon Peninsula, Marin Co., California, United States - GJ42449

Lawsonite

#GJ42449
Availability
Sold
Size
13 x 7 x 5 cm - Cabinet 
Formula
CaAl2Si2O7(OH)2·H2O (RRUFF)
Locality
Reed Station, Tiburon Peninsula, Marin Co., California, United States

This is a large plate covered by very nice 1-5mm bluish Lawsonite crystals, which are very rare. Lawsonite is formed during glaucophane grade metamorphism along with epidote, sphene and garnet. This locality is one of the most notable, but totally off-limits.

Lawsonite

Formula
CaAl2Si2O7(OH)2·H2O 
Crystal System
Orthorhombic 
Crystal Habit
Prismatic, Tabular 
Cleavage
Perfect, Perfect, Poor 
Luster
Vitreous - Greasy 
Color
colorless, white, gray, blue, pinkish 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Uneven 
Hardness
7.5 

Data courtesy of Webmineral.

Collection
Jungles Collection
Mineralpedia
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On Dakota Matrix
Previously Sold Lawsonite
On Dakota Matrix
Other Available Lawsonite
WebMineral
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Mindat
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