EARTHS. CALCAREOUS. 24. Picrolpatum; 
lOl 
c. With a fingle pointed 6-fided pyramid. 
The pyramids lolid. 
The pyramids hollow. 
Found in the mines of llenynia and Saxony, diaphanous, fiib- 
opake, rarely opake : colour cinereous, reddifli or yellowifii- 
white, iiabella, rofy, flcfli-colour or brownifh-rcd, yellovvilli 
or blackifti brown, with foraetimes feveral of the colours 
blended together, and often with a metallic lullre : differs from 
the Ferrum fpatofinn by the fmaller proportion of iron and 
oxyde of mangancfe it contains. 
(14. PICROSPATUM, C on fifl-ing of carbonate of 
lime, a nearly equal quantity of carbonate of 
magnefia, and a very little of the oxvdes of man- 
ganele and irons paralitical, hardifli: efTcrvel- 
cing flowly with acids. 
ftmarum, PiCROSPATUM. 
Picrofpatum cryilallinnm, Gttiel. fyst. 3. (ipp.p.^yi, 
Bitterfpath. Karsten Btrg. Journ i 79a. z. p, 80. 
Muricalcite. Kirnuan min. i . p. 92. 
Bitteripath. Thomfon ckem, 3. p. 61 z, 
1. In an earthy form. 
Found near of an olive colour, confining of a large 
proportion of mild carbonate of lime, and a imaljer ot carbet- 
nate of magnefia, but no alumina. 
2. In a ftony form, and amorphous. 
Found near Creufztnnxiauld, whitifli ; contains carbonate of 
lime 75. carbonate of magnefia 12. iron 13. 
3. Cryllallized. 
Found in Germany and Saejeden, greyiflt-white ; the cryilals are 
in a 6-fided prifm, tranfparent or pellucid, with a rough i'ur- 
face: contains carbonate of lime 52. carbonate of magneij-t 
25. iron and manganefe 3. Klaproth. 
