Home > Rock Forming Minerals – June 20 > MS1360 Microcline

Microcline - Sold

Microcline is a potassium aluminum silicate, specifically a member of the feldspar group. The mineral name derives the rrom the Greek for little and inclined, alluding to the minor angular deviation from 90° for the angle between its cleavages.

A cluster of greenish microcline crystals, to 2.0 by 1.9 cm, freed of their adhering matrix. Since this specimen was prepared by chipping away at the matrix, there are edge chips and chattering. A classic look for this specimen. This specimen was part of the personal collection of Ralph Merrill, proprietor of the prolific mail order business Minerals Unlimited. Merrill's collection card and label ship with the specimen. Previously in the collection of George Ashby of New York City, obtained from Greiger's in 1947.