Polishing characteristics and problems(d)

Silver-nickel-cobalt-arsenic-bismuth±uranium. The five metals association.(c,d)

Five metals-type silver association. The five metals association(a,d-f)

Quartz-sulphide vein mineralization(e)

Adventitiously introduced metals and grinding grit, dried immersion oil and amalgam (f)

Unmineralized intermediate rocks(b)

Metamorphosed sulphides(b)

Appalachian metamorphosed sulphides(f)

Altered iron-titanium oxides in alkali olivine basalt(b,c)

Supergene Alteration (e)

Tetrahedrite-tennantite-bearing copper-silver mineralization(f)

Ilmenite and magnetite in basalts and dolerites (a,b)

Polishing characteristics and problems(d)

Five metals-type silver association. The five metals association.(a-f)

The effects of tarnishing and carbon coating(b,c)

Porphyry-style tin-tungsten-molybdenum ores(a-d,f)

Massive volcanogenic sulphides(c)

High-temperature tin-tungsten-bismuth mineralization(a-d)

Copper, iron and low temperature tin mineralization(a)

Base metal-tin association(d)

Arsenopyrite-bearing associations(a-f)

Tellurides associated with gold mineralization(a)

Fossil placer(d,f)

Supergene enrichment of copper ores(c)