English

Noun

purple of Cassius ‎(uncountable)

1. (historical) A pigment formed from gold and tin salts, used in glassmaking.
   • 2002, Philip Ball, The Elements: A Very Short Introduction, Oxford 2004, p. 61

     Purple of Cassius was used not just by glassmakers but by porcelain manufacturers to make a fine red glaze.

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