i66 EARTHS. SILICEOUS. 55. QuartsDim. 



Found dBftribiJted in- moft parts of the globe, frequently in the 

 iiaEive oxydes of merals and m nerals, fometimes foymirvg 

 who4e rocks, and {bmetimes in beds and veins: of various 

 degree? of tranfpareney and colour, but generally white or 

 greyifli; IpeeiEc gravity frosn 26.4* to 265,5. 



iisiulare. Of a gonchaidal te>;trire, m tabHJar cryilals. 



Hoffmann Bsrg Jonrn. 1788* t,/-. 274. 



Found near SeheTjpuz in Hungary, and aear Freyharg m Saxsfty: 

 colour generaHy while,, rarely dull greenJOi: the tables- asc 

 molUy rhombic, thou-glv fometimes found 3-fided. 



ix^Uiw^ Of acofiichotdal textttre, m ctibic cry flats wbicti are fre- 

 quently hallow within* 



H. With the fs^es fquare. 



Sorn^ ind. foff, l^p 21, Karff l,ejk. min, I, ^» 104, 

 HoffmaftK Berg. Journ 178&. l./, 275. 



Zt With the faces rhombrc. 



i^. Mora, ind.fff. 2. p. 89. KarlL Lajh. awV. t. p, 104* 



icirnd in Stjoeden, Hungary^ Saxinjy and Bobemiay generaHy in 

 aggregate csyiUls which feeai to have acquired their form froia- 

 foi-ne other crv tbi wnreh i: hid enveloped, and which had 

 gradually mouldered, leaving a hollow in its place : colour 

 white, hoary, mari^aritaceouSj ox brown-red ^ pellucid, di- 

 apbanousj or nearly opake. 



cSasdricum Q{ 3 concbordaT texttire, m a double 4-fided pyramid-^ 

 Hoffmann Berg, 'Jaurn. 17S8 i./» 275, 



Found near Selmelw-g in ^•axuny^ oftentimes hollow within : 

 colour the fame a^ (^cuoicam- 



irie^dmm. Of 3 conchojdal texture, in a firnple ^-ftded pyramid. 



Born, ind fof. 2. p 88, 89. 



Found near HeffekuH in ^^wedm^ near Schnethurg in Saxoir^f in 

 aggregate cryltals which are fometimes hollow i luftre fre- 

 quently pclli^cid : colour reddilh or white. 



pp^amidak. Of 3 conchoidat textitrCj in a finglc 6-fided pyramid tr^af- 



vcrfely ikiate. 

 Soever iy Brit. Mia, 2. fa^, 102, 

 Karjhn Lejhs miner aL J, /. 102, 1 05, 



1. With the pyramid pcrfeft. 

 Born, ind.joj'i. 1. iah. "2., Jig. 10. 



2. With the pyramid truncate at top^ 

 Banu ind. foji, tab. 2. fg, z. 



3, With an additional d-fid^d pyramid at top. 



4, With an additional 6-fided pyramid at the top and the bafc- 



