Pyromorphite presents prismatic habit, and it often presents round and barrel shapes. Sometimes, it shows hollow and cavernous crystals. Its hardness is 3.5 to 4, and its density ranges from 6.5 to 7.1. It tends to display green, brown, yellow, and more rarely, orange hues.
Guangxi Province, China.
Lead can be replaced by calcium, making the mineral increasingly less thick.
It is a lead mineral, with no economic relevance, however, it is very appreciated by mineral collectors.
Source: MM Gerdau - Museu das Minas e do Metal -