Wooäßone. 3i5 became reddifh brown at 114 0 ; at 142°, itsfrag- ments flightly agglutinated. ; This fpecies is evidently nearly allied to jaiper, and often differs only by the aggregate of its pro- percies; its fragments fharper, and its tranfpa- rency often much greater, jöth Species. Woodftone. Holzftein of Werner. Lithoxylon of others Its colour is generally blackifh, or bluifh grey ; the former frequently paffes into the greyilh black, and the latter into the greyifh white; and this, from the light reddifh grey, into the blood or Cochenille red. Stldoin ochre yellow, or mountain green; fometimes reddifh, or yellowifh brown. Thefe colours moft commonly appear together, in fpots, blotches, or flripes, in the fame fpeci- men. It always manifefts its priftine flate, either by itsbranchy form, or its knots or roots. Its fur- face, like that of the wood from which it origi- nates, fometimes rough, fometimes uneven, fometimes -coarfely ftrcaked in the diredion of its length. Its internal luftre, 1. Its tranfparency, 1.2. Its fradure, conchoidal; fometimes imper- feflly, or approaching to the fine fplintery, fome times flaty; and generally, by its interlaced fibrous ftriidure, difcovers its origin. Its frag- ments, 3.* Often fplintery. * 1 Bergm. Jotirn. 1788, p. 189. 2 ItS