J.F.A. Breithaupt named amblygonite in 1817 from the greek amvlys (blunt) and gonia (angle) words, they referring to the cleavage angles between the planes are lower than 90 degrees. Amblygonite is a phosphate mineral wich contains lithium. It usually issues in lithium-rich and phosphate-rich granite pegmatites, in stout grainy massive aggregations and rarely in thick prismatic (often twinned) crystals. Huge crystals were found, but the transparent, good quality and nice colored crystals are relatively rare. It has been polished gemstone, but its hardness couldn’t reach the (Mohs 7) gemstone hardness. Localities: Germany, France, Spain, USA, Brazil, Australia, Mianmar, Namibia etc.