Thermal Alteration of Inclusions in "Rutilated" Topaz
Robert C. Kammerling and John I. Koivula, September 1, 1989
Faceted colourless topaz containing acicular inclusions has been offered for sale as "rutilated" topaz.
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The Rutilated Topaz Misnomer
John I. Koivula, June 1, 1987
An examination of so-called "rutilated topaz."
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Pink Topaz from Pakistan
Edward Gübelin, Giorgio Graziani, September 1, 1986
Pakistan has begun to produce fine gem-quality pink topaz.
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Sri Lanka: The Gem Island
Peter C. Zwaan, June 1, 1982
An overview of the many types of gem-quality material, and its inclusions, currently found in Sri Lanka.
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