Which common rock forming minerals exhibit a perfect single basal cleavage?
A) micas like muscovite and biotite
B) pyroxenes like augite
C) amphiboles like hornblende
D) feldspars like plagioclase and orthoclase

Question

Quizplus · Accepted Answer

Micas, including muscovite and biotite, are known for their perfect single basal cleavage, which allows them to be split into very thin, flexible sheets. This characteristic is not shared by pyroxenes, amphiboles, or feldspars to the same extent.

Which Common Rock Forming Minerals Exhibit a Perfect Single Basal