216 PHYSIOGRAPHY. C.LASS ij. 



also in beds along with rhombohedral Quartz, dodecahedral 

 Garnet, and several species of Augite-spar and Schiller- 

 spar. In single small crystals it is met with in the rock 

 called w) 'dtc-stone. 



4. Crystals and large cleavable varieties are found at St 

 Gothard in Switzerland, the Zillerthal in the Tyrol, the 

 Saualpe in Carinthia, the Bacher mountain in Stiria. It 

 is likewise met with at Langenloys in Austria, at Sebes in 

 Transylvania, in Bohemia, Moravia, and Saxony ; in Banff- 

 shire in Scotland, and in various places of North and South 

 America, in Siberia, &c. The llhaetizite is chiefly known 

 from Pfitsch in the Tyrol. 



5. Thin laminae of this mineral are sometimes employed 

 as a support in making experiments before the blowpipe. 

 Blue transparent varieties are cut and polished, and then 

 sometimes sold as an inferior kind of Sapphire, which is 

 a variety of rhombohedral Corundum. 



GENUS III. TRIPHANE-SPAB. 

 1. PRISMATIC TRIPHANE-SPAR, 



Prismatic Spodumene. JAM. Syst. Vol. II. p. 91. Man. 

 p. 135. Spodumene. PHILL. p. 142. Spodumen. 

 WERN. Hoffm. H. B. II. 1. S. 341. Triphan. HAUSM. 

 II. S. 526. Triphan. LEONH. S. 484. Triphane. HAU y. 

 Traite', T. IV. p. 407- Tabl. comp. p. 37. Traite 7 , 2de Ed. 

 T. III. p. 134. 



Fundamental form. Scalene four-sided pyramid 



of unknown dimensions ; so are also simple forms 



and the character of combinations. 

 Cleavage, P + oo = 93 BROOKE ; r + oo rather 



more distinct. Fracture uneven. 

 Lustre pearly. Colour various shades of greyish- 



green ; passing into greenish-white. Streak 



white. Translucent. 



