Topaz forms in pegmatites and high temperature quartz veins. It is deposited by fluorine-rich vapors in rocks of rhyolite composition and forms in cavities in ... www.ask.com |
Those colors are formed from lighter-colored stones that undergo irradiation and heat treatment. Topaz from certain localities may also turn pink or colorless ... www.minerals.net |
It can also be made white, pale green, blue, gold, pink (rare), reddish-yellow or opaque to transparent/translucent. Orange topaz, also known as precious topaz, ... en.wikipedia.org |