blue purple tanzanite rough stones

tanzanite discovered northern tanzania small region mererani hills 1967 scientific name ‘blue-violet zoisite’ stone 1968 attention famous jewellery company tiffany didn’t think ‘catchy’ sell named country origin marketing ploy american gem trade decided birthstone december 2002 blue purple rough stones crystal stones rocks gems metaphysical healing gravel mineral pebble theoretical theoretic abstract conceptual mental spiritual intellectual speculative quartz