Vienna turquoise is a glass made by compressing an aluminum phosphate precipitate that has been colored with copper oleate. We could find very information on this imitation turquoise glass. A website maintained by the Hecettepe University’s Department of Mining Engineering in Turkey reports that Vienna Turquoise was once made in the countries of Austria, Czechoslovakia (Czech Republic), France and England. We could find no current production source for the material.
We are intrigued by this glass and would like to know more about it. Please contact us if you can help to fill in the gaps.