Can you help make this a better article? What good localities have we missed? Can you supply pictures of better specimens than those we show here? Can you give us more and better information about the specimens from these localities? Can you supply better geological or historical information on these localities?
Lorandite TlAsS2 monoclinic
Here will go general remarks about lorandite specimens.
Lorandite China Lanmuchang
Lorandite is the main ore mineral in the thallium orebody at Lanmuchang, China, and its crystals there can reach 4cm, the world's largest.
(Dr. Philippe Roth, letter to Lapis, 12 (2007), #6, 6.)