1. 
   Zaffre
   Zaffre, a pre-scientific substance (see List of alchemical substances), is a deep blue pigment obtained by roasting cobalt ore, and is made of either an impure form cobalt oxide or impure cobalt arseniate. During the Victorian Era, zaffre was used to prepare smalt and stain glass blue. The first re...
   Found op http://en.wikipedia.org/wiki/Zaffre
   
   
2. 
   Zaffre
   Zaffre is a crude oxide of cobalt obtained by heating cobalt ore in a current of air. It was used to prepare smalt and to stain glass blue during Victorian times.
   Found op http://www.probertencyclopaedia.com/browse/GZ.HTM
   
   

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