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pyrorthitePYRORTHITE, n. A mineral little known, resembling orthite, but very different from it, for it burns in the flame of the blowpipe like charcoal; whereas orthite melts. Pyrorthite is in black plates, thin and almost parallel. |
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pyrorthitePYRORTHITE, n. A mineral little known, resembling orthite, but very different from it, for it burns in the flame of the blowpipe like charcoal; whereas orthite melts. Pyrorthite is in black plates, thin and almost parallel. |