Nick Barber đ 13 days ago
I'm giving my vote to tetrahedrite!
As Sack & Loucks showed in 1985, the multisite reciprocal replacement of Cu <-> Ag, Fe <-> Zn, Cu <-> Fe, and As <-> Sb make it the "Rolls Royce" of indicator mienrals for the pressure, temperature, and pH conditions of an ore deposit. Vote for the ore with more!
add a skeleton here at some point