198 PHYSIOGRAPHY. 



Specular Iron Sphene. 



5. The most beautiful crystals hitherto known, for size and form, are 

 found in the island of Elba, along with Iron Pyrites and Quartz. Splen- 

 did geodes of crystals also come from Framontin Loraine, St. Gothardin 

 Switzerland, and Dauphiny; at the last mentioned place, they occur in 

 veins in primitive rocks. Other localities are, the vicinity of Vesuvius 

 and the island of Stromboli, Norway, Sweden and Stiria. Micaceous 

 Iron-Ore is very common in the beds of Spathic Iron, in Stiria and Ca- 

 rinthia. Red Iron-Ore is found in Saxony, Bohemia, the Hartz, the 

 Fichtelgebiirge, at Ulverstone in Lancashire, and other places in Eng- 

 land, and in many other countries. Jasper clay iron-ore is almost entire- 

 ly confined to Lower Austria ; the columnar variety occurs in several 

 lecalities of the north of Bohemia, in the countries of Elbogen and Leit- 

 meritz ; the lenticular Clay Iron-Ore forms a bed in the transition dis- 

 trict of Central Bohemia, in the counties of Pilsen, Beraun, &c. 



But few localities of crystallized Specular Iron are known in the U. 

 States. What was believed to be Specular Iron, from Amity, (N. Y.), 

 and which occurs along with Spinel in limestone and Serpentine, is Crich- 

 tonite. Druses of lenticular or micaceous crystals, are found at Fow- 

 ler, St. Lawrence co. (N.Y.) The Micaceous Iron, in large masses, 

 consisting of thin waved laminae, themselves composed of the finest 

 scales, occurs at Hawley, (Mass.) Red Hematite is found atTicondero- 

 ga, upon Lake George ; and Lenticular clay-Iron ore is abundant 

 throughout the western part of New York. Pebbles of compact Red 

 Iron-Ore are found throughout the hills in the vicinity of Marietta, 

 (Ohio.) 



6. Specular Iron is an ore of the highest importance, and yields a con- 

 siderable proportion of the iron annually produced in the different quar* 

 fers of the globe. Red Hematite, sometimes also, compact Red Iron- 

 Ore, are used for polishing metals, and Reddle as a writing material. 



SPHENE. Prismatic Er uthrone-Ore. 



Primary form. Oblique rhombic prism. M on M = 

 133 30'. P on M =121 50'. 



