Page:Transactions of the Geological Society, 1st series, vol. 4.djvu/97

 In slender detached 6-sided prisms, beautifully transparent, often tinged in the central part with a rich orange-red colour; from Aldstone mines. Mr. Joseph Fryer.

''Carbonate of Barytes. Witherite''.—In irregular stalactitical minute crystals, opake and white; from Aldstone mines.

In dodecahedral crystals formed of two hexahedral pyramids (Sowerby, tab. 127,) of a pale wine-yellow colour; from Arkendale mines.

In elongated hexahedral pyramids or spicula: (Sowerby, tab. 129,) of a chalky white colour; from Arkendale mines. Massive, of a wine yellow colour; from Arkendale.

Incrusting fragments of galena, blende, and limestone; white and opake; from Aldstone moor.

Forming crystallized balls of a dirty white colour, and striated fracture, radiating from a center.

In irregular 6·sided prisms without pyramids, and perfectly transparent, occurring occasionally in the center of the, balls above mentioned; from the Welhope mines in the great limestone, where the veins in the upper sills bear heavy spar.

Of a clove brown colour and striated texture, attached to galena. From Dufton mines.

Though witherite is the common matrix to lead ore in Arkendale, it occurs only rarely further to the north.

''Sulphate of Barytes. Heavy spar''.—Foliatce, Cawk of the miners; greyish white, opake; from Aldstone moor.

In lenticular crystals (Jameson, vol. i. p. 558), cockscomb spar; from Dukesfield and Aldstone moor.