An Update on Imperial Topaz from the Capao Mine, Minas Gerais, Brazil
Daniel A. Sauer, Alice S. Keller, December 1, 1996
The Capao mine is one of the oldest and most productive fully mechanised Imperial topaz mines in the historic Ouro Preto area of Minas Gerais, Brazil.
Read More
The Rutilated Topaz Misnomer
John I. Koivula, June 1, 1987
An examination of so-called "rutilated topaz."
Read More
Pink Topaz from Pakistan
Edward Gübelin, Giorgio Graziani, September 1, 1986
Pakistan has begun to produce fine gem-quality pink topaz.
Read More
Altering the Colour of Topaz
Kurt Nassau, March 1, 1985
A review of the various techniques in use today to change colourless topaz to a variety of hues.
Read More
