82 
EARTHS. CALCAREOUS. 12. Spatutn. 
Found chiefly in limellone rocks in moft parts of Europe: colouf 
white, rarely yellowifli, pale brown, reddilh, green, very 
rarely crimfon, blueilh, purple or black: never quite opakei 
but fometimes with a pearly luftre. 
euhkum. With perfeftly cubic aggregate cryftals. 
Spat, crylfal cubic. JVall.Jnt. I./. 141. «.6. a. 
Pearl fpar. Soweriy Brit, miner. 1. p. 45. t. ig. 
Found in limertone rocks, generally white, fonaetimes with a 
pale roly luftre, and cluftered together in various fliapes. 
rhemheumt With aggregate cubic cryftals, the faces of which are ob- 
liquauglcd. 
So^'erby Brit, miner. 1. p- g. tab. 4, 
Syst, nat. 1. p. 164. n. 4. tab. Z. f. 13. 
Amxn acad. 1. p 481. tab. it.Jtg. iz, 
Gmel, J'yst. nat. 3. p. 446. tab. 1. jig, zz. 
z, Rhombic, with 2 oppofite obtufe margins truncate, 
Karsten Lejke miner, l . p, 260. 
3. Rhombic, with the faces convex. 
Kanten Lejte miner, i. p.z^g. 
Found in many mines of Europe, among limeftone rock, and is 
generally white, or reddilh from a mixture of iron. 
triedrum. With 3-fided prifms, terminated by a 3-fided pyramid. 
Porus prifmaticus. Gerh, mineral, p. 47. 
tetraedrum, W^ith 4-fided prifms. 
Born. ind. foft. l. p.b, 8. 2. p, 78. 
2. Prifmatic, with the alternate faces narrower. 
3. With the furface rugged. 
4. Prifmatic, with the terminal faces running into an aciculaf 
point. 
5. The prifms terminated at each end by a 3-fided pyramid. 
Found in the mines of Scotland near Strontian, in Silejia, Hut' 
gary, Saxony, and other places, fometimes opake, fometimes 
pellucid, frequently white, rarely reddilh or greenilh. 
prismaticum With perfedlly 6-fided prifms. ^ 
Gmel.Jyst, nfl/. 3. ^. 445. tab. 1. f. 5. 
Nitrum truncatum. Syst nat. xii. 3, p, 86. n. 5, 
Cryftallus fubnitriform. Amaen acad 1 . />. 497. r. iS./i ib, 
Spatum cryttallizatum. Wall. min. ’yZ.f. 5. 
2. Prifmatic, with the terminal faces convex. 
3. With the terminal faces ending in an acicular point. 
4. Prifmatic, with the alternate faces narrower. 
Gmel fist, nat. 3. p. 443. tab. 1. fg, 6. 
Cryftallus fubnitriformis. Amxn, acad. i./>. 479. 
