1^^ REDDISH TOURMALIN, 



Analysis of the stangenstein of Altenhurg [pycnite ofHauy], 



WTiite.schoerl -^^ ^his stone has been termed shoerllike beryl, Mr. 



«/ AltcnUurg. Klaproth examined it for glucine, after this earth had bee» 

 discovered in the beryl and emerald by Vauquelin ; but he 

 could not find the least trace of it. He had formerly ob- 

 served the great difference between it and beryl, when they 

 were exposed to the heat of a porcelain oven; as this stone 

 lost twenty-five per cent, and the beryl but one. This led 

 hira to conclude, in 1800, that it contained the same vola- 

 V tile matter as the topaz. Mr. Bucholz, apparently without 

 knowing this had been mentioned by Mr. Klaproth, found 

 it to be the fact; which was afterward confirmed by Vau- 

 quelin. Mr. Klaproth, having since analysed it with great 

 care, obtained the following vesvilts. 



Cmnponent Silex 43 



^^ ' Alumine AQ'5 



Oxide of iron • • • • 1 



Fluoric acid 4 



Water 1 



Loss.- 1*5 



100 



Allied to the This analysis shows, that it is nearly allied to the topa;2. 

 topaz. The 3*3 per cent of lime found by Mr. Vauquelin are sup- 



VauqueUn. p<^sed by Mr. Vauquelin himself, to have been owing to 

 the impurity of his specimen. 



Peddi-ih 



Wor:(vian 



touitiiiitin. 



Ayialysis cf the reddish tourmalin (f Moravia. 



This tourmalin is found in the mountain Hradisko, near 

 Ro'zna, imbedded in a oom[)act whitish gray quartz, or in 

 lepidolite. It is in the form of prisms, or needles, of a 

 peach-blossom colour, which verges in several parts to 

 greenish, yellow, and gray white. As it is met with imme" 

 diately under lepidolite, it has been taken for lepidolite 

 crystallized; and it is under this name that Estren has 

 given a very minute description of it, to which I refer the 

 deader. By some preliminary trials it was soon fouad, that 



this 



