Hypertext Webster Gateway: "Porcelanite"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Porcelanite \Por"ce*la*nite\, n. [Cf. F. porcelanite.] (Min.)
A semivitrified clay or shale, somewhat resembling jasper; --
called also {porcelain jasper}.
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