Muscovite is the most common mica, found in granites, pegmatites, gneisses, and schists, and as a contact metamorphic rock or as a secondary mineral resulting from the alteration of topaz, feldspar, kyanite, etcn pegmatites, it is often found in immense sheets that are commercially valuable.
Muscovite ແມ່ນ mica ທີ່ພົບເຫັນຫຼາຍທີ່ສຸດ, ພົບໃນເມັດຫີນ, pegmatites, gneisses, ແລະ schists, ແລະເປັນຫີນ metamorphic ຕິດຕໍ່ຫຼືເປັນແຮ່ທາດຂັ້ນສອງທີ່ເກີດຈາກການປ່ຽນແປງຂອງ topaz, feldspar, kyanite, ແລະອື່ນໆໃນ pegmatites, ມັນມັກພົບໃນ ແຜ່ນໃຫຍ່ທີ່ມີຄຸນຄ່າທາງການຄ້າ.