EARTHS. SILICEOUS, 49. Smiris, 
157 
Zeolites panic, fubtiliff. Wall. fid. i. f. 312. n. 3, 
Lapis Lazuli. Kn'-'^-van miner, i. p. 283. 
Lapis Lazuli. Sckmei£er mineraU i- p. > Jo. 
Lazulite. ThomfoH chem. 3. p. 561. 
Found in the coniines of Siberia, Tartary, and China, in Ame- 
rica, and various parts of Europe, generally in iolid mafl’e.s 
and ufually full of veins of quartz, limeftone and p) rites : 
colour fky-hlue, often with white or yellow fpots or veins: 
if calcined it eft'ervefees a little with acids^ and foims witn 
them a gelatinous mafs: it retains its colour a long time in 
the fire, but at lall becomes brown : when boiled in con- 
centrated vitriolic acid, it diffolvcs flowly, and lofes its 
colour. It is ufed for extrafling that fine colour, called 
ultramarine, and is manufaffured into various veflels, and 
ufed in Mofaic work. Specific gravity from 2,760. to 
2,945. contains filica 46,0. alumina 14,3. carbonate of 
lime 28,0. fulphate of lime 6,5. pxyde of iron 3,0. water 
2,0. Margraff, 
49. SMIRIS, Confining of alumina, filira, and a 
large quantity of iron : very hard, of a cornmon 
form, opake, attrafted by the magnet, red when 
powdered : not fufible per fe. 
ftliens. Smiris. 
Ferrum rctraft. rubricof. Sjjl. nat. xii. 3. p. i 39 * ' 7 r 
Ferr. mineralis. Pf'all.Jyst. min. 2. p. 343. k g- 
Emery. Kirovan miner. Scl}meij‘er mineral. Z. p 85- 
Emcry. Thom/on chem. 3. p. 509. 
Found at Guernjei, in Germany, Italy, and Spain, in the iflards 
of the ArchUpelago, but is ufually imported from the lile of 
Naxos, always in fliapelefs niillcs, and mixed with other 
minerals : colour grcyilh-blacfc, when reduced to powder 
reddifh-grey ; has a granular texture, and is io hard as to 
cut all Hones e.xcept the diamond, upon which jccount it is 
principally ufed in the form of powder for rolijning incCjis : 
fpecifcc gravity about 400, 
