VERY LOW	LOW	INTERMEDIATE	HIGH	VERY HIGH
löl+po+S2=asp	löl+S2=asp+As	po+S2=py mgt+S2=hem+py	ten+S2=enar cpy+py+S2=bor	dig+S2=cov

SYSTEM	1	2	3	4	5	6	7
Fe-S	pyrrhotite <p>(po)	pyrrhotite	pyrrhotite	pyrite (py)	pyrite	pyrite	pyrite, S
As-S	As	AS	As	As	realgar, orpiment	orpiment, AsSglass	AsSglass
Fe-As-S	löllingite+po, löllingite	löllingit, arsenopyrite (asp)	arsenopyrite	aresenopyritpy+asp, py+As
Cu-S	chalcocite	chalcocite	chalcocite, digenite	digenite	digenite	digenite	covellite
Cu-Fe-S	chalcopyrite (cpy) +pyrrhotite	chalcopyrite (cpy) +pyrrhotite	chalcopyrite +pyrrhotite	chalcopy +pyrite	chalcopy +pyrite	bornite (bor)+py, digenite +pyrite	digenite +pyrite
Cu-Fe-As-S	löl+bor, löl + cpy	asp+cpy, löl+cpy, asp+tennan	asp+cpy, asp + tennantite	asp+tennan, asp+py	enargite	enargite	enargite
Cu-Fe-S-O	magnetite (mgt) +bornite, mgt+cpy	mgt+bor, mgt+cpy	mgt+bor, mgt+cpy	mgt+bor, mgt+cpy, mgt+py	mgt+cpy, hematite (hm) +py	hem+py	hem+py
OTHER	Bi, Ag, Hg, Sb, Sb+po, galena(gal)+hematite	Bi, Ag, Hg, Sb, Sb+po, galena(gal)+hematite	Bi, Ag, Hg, Sb, bismuthinit, stibnite, gal+hem, argentite, berthierite	bismuthinit (bis), argentite, berthierite, cinnabar, stibnite(stb), gal+hem, stb+py	bis, arg, cin, stb, gal+hem, anglesite +py, stb+py, famatinite	bis, arg, cin, stb, stb+py, anglesite +py, famatinite	bis, arg, cin, stb, stb+py, anglsite+py, famatinite
mol%FeS in sphalerite coexisting with Fe-sulf	>40	40-35	35-20	20-5	5-0.1	0.1-0.01	<0.01