C the form found in gypsum or anhydrite
Plate 34
Orthoclase, a cleavage piece, a and b the perfect cleavage planes, and c the imperfect cleavage plane
Crystal forms of orthoclase
A the simple crystal
B the twinned form
C the form found in gypsum or anhydrite
Orthoclase, a cleavage piece, a and b the perfect cleavage planes, and c the imperfect cleavage plane
A the simple crystal
B the twinned form