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KYANITE, OR CYANITE1 35 3. We sometimes meet with crystals, formed partly of kyanite, partly of grenatite, and the two substances at their junction are intermixed,—a proof of their cotem- poraneous formation. It is also worthy of remark, as noticed by Steffens, that kyanite and grenatite agree very nearly in chemical composition. 4. Professor Nau, in the first volume of the Annals of the Society of Wetterau, describes, in the following terms, a mineral under the name Fibrous Cyanite: “ Co lour reddish-white, passing into flesh-red, and pale peach- blossom red ; also yellowish, greenish, and bluish-grey ; massive; dull, glistening, and silky; diverging, seldom parallel fibrous, which sometimes passes into perfect fo liated ; fragments splintery ; opaque, or very feebly trans lucent on the thinnest edges; soft; white-coloured streak; difficultly frangible; 3.100. It occurs in gneiss, along with schorl, and titanitic iron-one, near Aschaffenburg.'” 5. Scldottheim, in the Magazine of the Society of the Friends of Natural History in Ilerlin, gives an account of a fossil from India, which he conjectures to be nearly allied to Kyanite, and names it Sapparite. The follow ing is his description of it: “ Sapparite.—Colour pale Ilerlin blue, but when held in particular directions, shews a silver-white splendent opalescence. It appears to be crystallised in rectangular four-sided prisms. The longitudinal fracture is foliated; the cross frac ture uneven, or imperfect conchoidal. It is translucent. It is semi-hard, inclining to soft. It affords a pale greyish-white dull streak. Geographic Situation.—It was brought from Pegu or Ceylon, imbedded in a druse of spinel crystals. C 2 Observations.
