pyromorphyte from China

China pyromorphyte
 
 Stunning green crystals!
 It deserves its place in the most refined collections!
 
 Origin: Daoping Mine, Gongcheng Co., Gullin Guangxi, China.
 Size: 13cm by 8cm by 4cm
 Chemical formula: Pb5(PO4)3Cl
 Crystal system: Hexagonal
 Hardness Mohs scale: 3.50 to 4.00
 Definition: Pyromorphite is a mineral species composed of anhydrous lead chloro-phosphate. It also contains traces of fluorine, radium, calcium, chromium and vanadium. Pyromorphite forms common pseudomorphs with galena and cerussite . It should be noted that the polysphaerite variety considered for a long time as a calcic variety of pyromorphite has been raised to the rank of species and recognized by the IMA under the name of phosphohedyphane .