ORDER Vii. DODECAHEBRAL GARNET. 365 



soiL Melanite is imbedded in a kind of lava, but occurs 

 also implanted in the geodes ejected by Vesuvius, and 

 Pyreneite in limestone. Common Garnet is likewise one of 

 those species occurring at Mount Vesuvius, along with 

 pyramidal Garnet, several species of the genus Feld- 

 spar, &c. : much more frequently, however, it is found in 

 beds, consisting either wholly or for the greater part of its 

 varieties, accompanied by octahedral Iron-ore, several spe- 

 cies of Augite-spar, &c. Thus also are found Allochroite 

 and Colophonite. Some varieties occur in veins traversing 

 serpentine and other rocks. 



4. Several of the varieties mentioned above have been 

 found only in a few localities. Grossular occurs along with 

 pyramidal Garnet in Kamtschatka, in a kind of serpentine ; 

 Melanite at Frascati and Albano near Rome ; Pyrope near 

 Bilin in Bohemia, and in the serpentine of Zoblitz and the 

 forest of Zell in Saxony ; Pyreneite near Bareges in the 

 Pyrenees. Precious Garnet, sometimes in large but not 

 very transparent crystals, and often covered with a coat of 

 chlorite, occurs at Fahlun in Sweden, and in many localities 

 of the Tyrol, Carinthia, Stiria, Switzerland, Hungary, &c. 

 The varieties presenting lamellar compositions are found 

 in Greenland, common Garnet in large quantities at Brei- 

 tenbrunn, Berggiesshubel, Geyer, and other places in 

 Saxony, at Drammen and Arendal in Norway, Fahlun, 

 Longbanshyttan, &c. in Sweden, at Orawitza in the Ban- 

 nat, at Dobschau and Rezbanya in Hungary, at Saldenho- 

 fen in Stiria, in Siberia, and many other places. Colopho- 

 nite is known from Arendal, Ailochroite from Drammen, 

 and curious varieties of the latter of yellowish-white and 

 grass-green colours also from the valley of Zem in Salz- 

 burg. The transparent crystals of precious garnet, called 

 Ahnandinc, are chiefly brought from Ceylon and Pegu, 

 where they occur in the sand of rivers. A fine variety ap- 

 proaching in colour to Pyrope, is found at Elie in Fife- 

 shire. 



5. Transparent varieties of dodecahedral Garnet are used 

 as gems, but are not highly prized. Among these, how. 



