Biotite granite from Spain exhibiting plagioclase feldspar, quartz and biotite mica, specimens have been cut and polished on 1 surface area letting effortless viewing on the crystals with no help of magnification. Phyllite is usually a foliated metamorphic rock formed from slate that has been further metamorphosed. These specimens from https://powder-pedialyte46801.prublogger.com/27007441/helping-the-others-realize-the-advantages-of-is-mica-a-feldspar