from The Century Dictionary.
Sorry, no etymologies found.
The pieces of ore found on lowest end of the tube, A, were dark colored and semi-fused; part of one of these pieces was crushed fine, and tested; see column I.
Farril, in marking the various appearances exhibited by the fused and semi-fused materials of which it is composed, -- the granites, gneisses, mica-schists, hornblendes, clay-slates, and red sandstones of the locality.
The Cruise of the Betsey or, A Summer Ramble Among the Fossiliferous Deposits of the Hebrides. With Rambles of a Geologist or, Ten Thousand Miles Over the Fossiliferous Deposits of Scotland Hugh Miller 1829