The Definitive Guide to Paraiba Tourmaline
, the sodium iron (divalent) endmember on the team. It might account for ninety five% or more of all tourmaline in mother nature. The early historical past of the mineral schorl demonstrates the identify "schorl" was in use before 1400 mainly because a village acknowledged these days as Zschorlau (in Saxony, Germany) was then named "Schorl" (or min