MICROCLINE
MICROCLINE Microcline – KAlSi3O8 – is a very common tectosilicate, an important rock-forming mineral of granitoid rocks. It is an important industrial mineral for the manufacture of porcelain, also ceramics and glass. Microcline almost always is twinned according to various laws, which greatly simplifies its recognition under the microscope. More common are the polysynthetic twins […]
MINIUM
MINIUM Minium – Pb3O4 – is a very rare oxide, a secondary mineral of lead. It participates in the secondary mineral assembly of polymetallic ores, but is never the main ore mineral. Macroscopically, it can be confused with litharge (tetragonal PbO, also very red) and with powdery cinnabar (HgS). As it contains lead, it is […]