Home > Type Localities – March 17 > MS1544 Lawsonite
Lawsonite
- Reed Station
- Tiburon Peninsula
- Marin County
- California
- U.S.A.
- 3.8 by 3.4 by 2.4 cm – Miniature specimen (fits into a 5 cm cube)
Lawsonite is a calcium aluminosilicate mineral (Ransome, 1895). Lawsonite forms during tectonic processes, when plate margins descend (subduct) into the lower crust, and are later brought back to surface. Lawsonite is an indicator mineral for blueschist rocks. The mineral name honors Professor Andrew C. Lawson (1861-1952), geologist at the University of California (Berkeley).
Lawsonite forms blue crystals to 3 mm on a schist matrix. The schist matrix consists primarily of glaucophane, with accessory actinolite, almandine, and margarite.
Price: $50
Item code: MS1544
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