NOME X. JACINT ROCK. 



should not have been explained, especially as it 

 stands in Saxony, the very focus of mineralogic 

 knowledge. Henkel, as quoted by Patrin, says 

 that the mountain or hill called Schneckenberg 

 is near the valley of Tanneberg. The slope of 

 the mountain is gentle ; but from the summit 

 rises, like a tower, the topaz rock, being about 

 eighty feet in height, and three times as broad. 

 But we are still to learn the composition of the 

 adjacent hills*. 



NOME X. JACINT ROCK. 



A rock, which contains jacints, and which is 

 itself composed of large white, greenish, and 

 yellowish grains, consisting of quartz and of 

 jacint, so that it may be called jacint rockf. ' 



* Among the ejections of Vesuvius there occurs what may be 

 called Chrysolite rock, that gem even sometimes serving as a base 5 

 but these fragments, placed by Gmelin among the roqjts, may per-, 

 haps be mere vein-stones, or may occur in small quantities. Per- 

 haps rocks of Corindon may be discovered. It was known to 

 Woodward by the name of Telia Corivindum, and Nello Cori* 

 vendum. 



f Sauss. 1Q03. 



VOL. II. K 



