148 
Earths, siliceous. 42. Gemma. 
GranadiU 
lus. 
8. In 6-fided prifmf. 
a. The prifms perfetl. 
b. The prifms terminated each fide by a 3.Cded pyramid, 
Omel.fyst. nat. 3. p. 446. r. i. f. 26. 
The faces fmooth. 
The faces diagonally ftriate. 
The margins of the prifms truncate. 
G,W fyst. nat. 3. p. 447. t. l.f. 32. 
All the margins truncate. 
Gntel. Jyst. nat. 3. p. 447. t.\, f. 28. 
Sorwerby Brit, miner, tab. 43, 
9. In t2-fided prifm?. 
Gmel.fyst, nat. 3. p. 445. t. I./. 23, 
Amxn. acad. I, /.48Z. t, ib.yi 25. 
Found in Britain and various parts of Europe, Madagajcaf^ 
Ethiopia, India, Syria, See. fometimes in mafs, fometiine* 
cryftallizcd, in innumerable varieties of black, brown, put' 
pie, red, green, and yellow : texture foliated : fradluf® 
commonly conchoidal : luftre glalTy and waxy : colour moft 
commonly red : is brittle and eafily broken, and often 
trafted by the magnet; fpecific gravity from 3,750. 
4,188. contains filiea 52,0. alumina 20,0. oxyde of iro” 
17,0. lime 7,7. Fauquelin. 
Hard, rather ponderous, red, of a parallelly fibrous tex- 
ture, melting with difficulty, in acicular prifmati^^ 
cryftals. 
Rother Schoerl. Bindheim.chem. annal. 1792. 2. p. 317. 
Red Shorl, SchrmiJJ'er mineral. p.%\. 
Found in S’witzerland, the Pyrenees, Cadile, Hungary, and 
Siberia, generally in Qgartz or Granite: colour from that of 
a peach-blolTom to a blood-red: diaphanous, Ihining out-, 
wardly, breaking into acute fragments, exhibiting convex 
faces when broken tranfverfely, acquiring a high gioffy po' 
lifb : the acicular cryftals fometimes fcattered, lometiross 
clavate, fometimes difpofed in a reticular manner; ipecif^ 
gravity 3,100. contains in 200 pans, filica 114. alumin*. 
. 70. magnefta i. oxydes of iron and mangauefe 10, 
1 
