EARTHS. CALCAREOUS. 25. Gypfum. 



103 



xhist€£Uini 



fin-€ium. Meagre and dry, brittle, breaking Into long fplintcry frag- 

 ments, of a comiiion foi m. 

 Stiriiim gypfeum. SylL nat. xii- 3. /.■47. n. i, 

 Gypfum filament, pnral. IVall. fyjh \, 

 FJbrous Gypfum. Kinxan miner, i. /»• 122. 

 Fibrous Gypfum. SchmeiJJer mineraU ». />• 242. 

 yibrous Gypfum. Tbomfon chem^ 3. /. 616, 

 Sulphate of lime, var. plumoi'e. So'iLerhy Brii, min.t, it* 



2. Very tranlparent, fixed, united. 



Stirium alabaflfinum, Syji. tiat, -xCi, 3. f. 47. n, 3. 



3. Obfcurc, fixed, with decuiTate ramcntations. 

 Stirium bafaltinum. Sxji. nat. xii. 3. p, 47. n. 4. 



Found in various pans of Britain arid Europe^ and according tO' 

 Mr- S<nverby^ is formed by the decompofition of fulphur of 

 iron or pyrites, the fulphur of which combining witlvoxygene 

 forms fulphuric acid, which coming in conta£> with Jime, 

 forms this Gypfum in various fanciful modes: its texture is" 

 fibrous, fijamentous, or radiate, fiexuou^ or ilraight, parallel 

 orfcattered: colour white, grey, yellowifh, red, or honeys 

 colour, with the colours fometimcs meeting in ilripes. 



Meagre and dry, breaking into indeterminate fragmcnt^^ 

 tibrofo-lamellous, with Ihort fibres cutting the loiLi- 

 tions perpendicularly. 



Gypfum ftriatum. Wall, fy ft, min* i. />. 171. jt, 7. c. 



Found iw lujcany tLKKdWirtemberg', white. 



Meagre and dry, radiate in a parallel manner, breaking, 

 into indeterminate fragments. 

 Kar St, Lejke mineral, i. p. 228. 



Found near Coburg^ in the province of Mansfield: the rays fome- 

 times broader, fometimes narrower. 



ttsuale. Meagre and dry, lamellar, with the foliations geiiera!If 



fpherical : breaking into indeterminate fragments* 



Granularly foliated Gypfum. Kiravan, \. p. 12"^, 

 Lamellated Gypfum. SchmeiJ/lr mineral, l. p. 241. 

 Foliated Gypfum. Thomjins chem. 3, p.6ii>^ 



1. Shining internally, 



Gypfum part, aren, micant. SyJl. nat, xii. "^'P' 45* ■^' ^•■ 

 Wall, fyft.min. \. jj. 157. Cronjl.min. fed. lb» 



2. Without luftre internally, 



Gypfum argillofum. Syft.nat. xii. 3. f>»A-S' ^" '• 

 PValL fifi.min. \,t. 156. n. 2. Muf. TeJ'. 14. ;:. 12. 



Found in Britain and various parts of ^'z^rfi'^t'/?, in Tfaft itiaffeSy 

 and fometimes in lenticular cryftals : colour yellowifh of 

 blackifh-grcy, cinereous, ochrkceous, ilefh-colour, rarely ha» 



radlatum* 



