| 释义 |
isopyre Min.|ˈaɪsəʊpaɪə(r)|
[Named 1827; f. iso- + Gr. πῦρ fire.]
An impure variety of opal, containing admixtures of alumina, sesquioxide of iron, and lime.
1827Edin. New Philos. Jrnl. III. 264 The lustre of isopyre is less bright and glassy than that of obsidian. 1883G. F. Kunz Amer. Gems in Min. Resources U.S. 493 Isopyre is found in small veins from one to three inches in width. |