O1R1T1H4O1C3L1A1S1E1
15 points
ORTHOCLASE is validvalid
[n ORTHOCLASES]
common or potash feldspar crystallizing in the monoclinic system and having two cleavages at right angles to each other [n -S]
[n ORTHOCLASES]
common or potash feldspar crystallizing in the monoclinic system and having two cleavages at right angles to each other [n -S]