is a Lead Molybdate with formula PbMoO4 and hardness of 3.
A popular collectors mineral with heavy specific weight, not easy to cut due to its brittleness and low hardness.Translucent partial transaparent. Some pits may be visible . From Ojuela Mine,San Juan Poniente,Mapimi,Municipio Mapimi,Durango Mexico- A tiny chip on one corner.
Weight: 5.11 ct.