Doubts & Discussion › Category: Theory › Mineralogy 1 Vote Up Vote Down ravi asked 5 years ago All pleochoric minerals are anisotropic but not all anisotropic minerals are pleochoric. How 1 Answers 0 Vote Up Vote Down nitin answered 5 years ago It’s depend on the vibration direction of light in all three direction. It may possible you get same colour in two direction and a different colour in other