PHYSIOGRAPHY. 149 



Quartz. 



eties from Hungary and Siberia, are pale violet blue ; some, called 

 smoky-topaz, from Bohemia, are brown and yellow. The Scottish Cairn- 

 gorm-crystals, sometimes possess seTeral bright tints of these colors, in 

 one and the same specimen. Amethysts, of various colors, are brought 

 from Brazil ; but the finest, violet-blue colors, come from Ceylon, India, 

 and Persia, where some of them are found in pebbles. Less transparent 

 or well colored specimens, occur in original repositories, at Porkura and 

 other places in Transylvania, in Hungary, Siberia, &c. -Some varieties 

 are also found in Scotland, in Saxony, in the Hartz,in Bohemia, in Sile- 

 sia, &c. ; and they are met with in veins, in agate balls, or in secondary 

 deposits. Rose Quartz occurs at Rabenstein near Zvviesel in Bavaria, 

 and in Siberia ; the rnilk-white varieties of it are known from Norway, 

 Spain, France, &c. The locality of Prase, is Breitenbrunn in the min- 

 ing district of Schwarzenberg in Saxony. Smalt blue Calcedony, some- 

 times crystallized, occurs at Tresztyan in Transylvania; the stalactitic 

 and renifonn shapes, occur in fine varieties in Iceland and the Faroe 

 islands, in amygdaloid ; at Hiittenberg and Loben in Carinthia, in beds 

 of iron-stone : also in Hungary, Transylvania, in Scotland and other 

 countries. Most beautiful specimens have been found in Trevascus 

 mine in Cornwall. Carnelian is brought from Arabia, India, Surinam, 

 and Siberia; it is met with also in Bohemia, Saxony, &c. ; fibrous Car- 

 nelian, in Hungary; Chrysoprase, at KosemGtz in Silesia, in serpentine. 

 It is not known from whence the ancients received the Plasma found 

 among the ruins of Rome; but several varieties, resembling it, have 

 been recently discovered in Moravia and Bavaria. It occurs in India, 

 from whence it is occasionally brought in beads and other ornaments. 

 Flint is a common mineral in England, France, the islands of Rilgen and 

 Seeland, in Poland and Spain. Near Grafz in Stiria, it occurs as one of 

 the ingredients of gneiss. Splintery Hornstone produces the remarkable 

 pseudomorphic crystals from Schneeberg in Saxony ; it also occurs in 

 veins in Hungary and other mining countries ; in beds, it is found in 

 Norway, and in spheroidal masses in limestone in the Tyrol. Flinty 

 slate forms beds in numerous countries. Fibrous Quartz occurs in the 

 Hartz ; Cat's eye in Ceylon, the coast of Malabar, and also in the Hartz, 

 Heliotrope used formerly to be brought from Ethiopia, but is now gene-^ 

 rally obtained from Bucharia, from Tartary and Siberia. Iron-flint is 

 frequent in the iron-stone veins of Saxony, Bohemia, Hungary, Tran- 

 sylvania, &c. ; and along with it, often also, common Jasper. Striped 

 Jasper occurs in Siberia, at Grandlsteen in Saxony, at Ivybridgein Dev- 



13* 



