Do you have back issues of Garden Gate available for sale? a. We no longer have individual back issues available for purchase; however, we do have annual volumes.
Very good Topaz crystals also come from the Jos Plateau, Plateau State, Nigeria. In Mexico, a famous locality that produces multicolored Topaz with brownish-red tints is Tepetate, San Luis PotosÃ­; along with the Veronica Mine, Copetillo; and Villa Garcia, Zacatecas.
Topaz is a silicate mineral of aluminium and fluorine with the chemical formula Al2SiO4(F,OH)2. Topaz crystallizes in the orthorhombic system, and its crystals are mostly prismatic terminated by pyramidal and other faces.