Microcline, Himalaya Mine, Mesa Grande, San Diego County, CA, Dr. David London Collection L-340, Collected c. 1940s - 1950s, Small Cabinet 4.2 x 5.5 x 9.5 cm, $100. Online 4/9/15.
Light gray microcline crystal showing prism faces and local dissolution features. Sharp twin planes and no point of attachment as specimen was naturally dislodged in pocket with re-growth on base. Classic California location for the species. Collected c. 1940s-1950s in the glory days of the mine. Dr. David London Collection L-340. In great condition.