Examine This Report on Paraiba Tourmaline
, the sodium iron (divalent) endmember of your group. It may account for 95% or even more of all tourmaline in nature. The early record from the mineral schorl demonstrates that the name "schorl" was in use just before 1400 because a village regarded today as Zschorlau (in Saxony, Germany) was then named "Schorl" (or minor variants of this name), a