color greenish blue comments paraiba is a gem variety of tourmaline containing copper (cu) and manganese (mn) the variety name is derived from the brazilian locality paraiba where this gemstone was first mined however today it may come from a number of localities tourmaline is commonly heated to improve or change its color cut step / step Date 2025-12-01 dimensions 1100 x 634 x 513 mm Group tourmaline phenomena none PIN 6920 Report # th25g118231 shape octagonal species natural elbaite technology used microscope, edxrf, uv / vis / nir Transparency Transparent Treatments (see comments) Variety Paraiba Tourmaline Weight 3.23 carats