194 
EARTHS. AGGREGATE. 6i. Porphyrius. 
Found in Egypt, Arabia, Greece, Italy, South of France, Siierif’ 
and moft pans of Europe, idmetimcs detached, fometim«? 
forming rock?, mountains, or their principal parts, opake, •’* 
a texture more commonly approaching to the conchoidal th*® 
the llaty, hard and admitting a fine polifh, breaking into i®' 
determinate fragments, eafily melting in the fire; generally 
of a common form, rarely in prifms and then always mix«^ 
v.'ith other bodies, as hornblend, mica, fhorl, or quart*’ 
infinitely varying in the colour, form, dillribution, and nii-^' 
ture of its conllituent parts ; the feldfpar generally white 
reddifh, immerfed in j .fper in the form of dots, fpots, flripe-’ 
or prifms, and lomctimes mouldering away and leaving ea' 
vities; the jafper red, brown, black, or green, rarely duH 
grey or of two colours, as black and green, red and orange* 
It wasufed by the ancients in the ftrutlure of columns, teir>' 
pies, and edifices of the highell orders. 
corilcanus, Compofed of jafper? and adiinote, 
Marmor verd. di Corf. Freber Br. a. Welfch. 21. p. 357. 
Found in CorRca, white with violet fpots and rays of 
aftinote. 
amiantims. Compofed of jafper, afbeft, and quartz. 
Found detached in the province of Mansfeld ■, the jafper re'J’ 
the afbell greenifh, and the quartz white. 
nitens, Compofed of jafper, and mica. 
Hoepfn. mag, heh. natur. i. p. 278. 
Found in S’witaerland, and near Anndherg in Saxony. 
scorlinus, Compofed of jafper, and ftiorl. 
Hoepfn. magas.. helv, natur. i . p. 27S. 
Found in Snuitxerland, 
effervescent, Compofed of jafper, and fpar. 
Hoepfn, mag. helv. natur. i. p, z“i%. 
Found in Svcitccerland, ^ 
granatifer. Compofed of jafper, and garnets. 
Hoepfn mag. helv. natur, i, p. 278. 
Found in Svoitxeriand. 
crjttallinus, Compofed of jafper, and cryftals of quartz. 
Hoepfn. mag, helv, natur, I . p. 278. 
Found in Sviitzerland. 
Achates, Compofed of jafper, quartz, rock cryftal, amethyft, ch*'' 
cedony, cornelian, amt onyx, hornftone, anti fiint, 
rioully combined together. 
Silex rupeflris. Syfi. nat. xii. 3 p. 70. «, 10. 
Achates duriflima. Wail.fst, «. zz. 
