Tourmalines occurring in the veins are zoned while the AMB tourmalines are unzoned. Mineral chemistry and discrimination diagrams reveal that cores and rims of the vein tourmalines are distinctly different.
Tourmalines occurring in the veins are zoned while the AMB tourmalinesare unzoned. Mineral chemistry and discrimination diagrams reveal that cores and rims of thevein tourmalines are distinctly different.