- pyrophane
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A mineral which is opaque in its natural state, but is said to change its color and become transparent by heat.
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pyrophane
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pyrophane — ● pyrophane adjectif Qui devient transparent par l action de la chaleur. pyrophane [piʀɔfan] adj. ÉTYM. 1811; de pyro , et phane. ❖ ♦ Sc. Que l action du feu rend transparent … Encyclopédie Universelle
Pyrophane — Pyr o*phane, n. [See {Pyrophanous}.] (Min.) A mineral which is opaque in its natural state, but is said to change its color and become transparent by heat. [1913 Webster] … The Collaborative International Dictionary of English
