David K. Joyce Minerals

Cobalt/Gowganda, Ontario -Various Species

Although Cobalt was famous for the vast quantities of silver mined there over many decades, many other minerals, some fairly rare, have been found there in impressive specimens, confirmed by electron microprobe analysis. Here are some.

All prices in Canadian dollars. For payment in US$, deduct 16% or multiply by 0.84.

Click on any of the following thumbnails to view a larger image of the specimen.

NickelineCobalt/Gowganda, Ontario -Various Species
  • Item #17905
  • Nickeline
  • 8.5x7x3.6 cm
  • Largest Crystal Size: n/a
  • $75.00
  • Cobalt
    Ontario, Canada
  • This piece is almost solid nickeline, associated with coarsely crystallized calcite. Doesn't get much richer or heavier as a nickeline specimen!
Skutterudite, ArsenopyriteCobalt/Gowganda, Ontario -Various Species
  • Item #18023
  • Skutterudite, Arsenopyrite
  • 9.0x8.8x6.0 cm
  • Largest Crystal Size: 11mm
  • $150.00
  • Hudbay (Rustex) Mine
  • Gowganda
    Ontario, Canada
  • The top of this specimen reveals an opening exposed by etching calcite away. The opening is lined with sharp, classic crystals of skutterudite showing typically lop-sided cubes with smaller cube-octahedral crystals of skutterudite on the bigger faces. Really an excellent specimen of this mineral from a classic location! Some tiny arsenopyrite crystals are scattered around. Shows well!
RammelsbergiteCobalt/Gowganda, Ontario -Various Species
  • Item #19108
  • Rammelsbergite
  • 18.5x14.2x1.0 cm
  • Largest Crystal Size: n/a
  • $110.00
  • Keeley Mine
  • Cobalt
    Ontario, Canada
  • This is a wonderful slice of vein material, from the South Lorrain area (near Cobalt), that is 2/3 lobular aggregates of rammelsbergite. Analysed. An excellent example of this relatively rare mineral.
Acanthite, pseudo Argentite, CalciteCobalt/Gowganda, Ontario -Various Species
  • Item #17117
  • Acanthite, pseudo Argentite, Calcite
  • 8.8x6.8x2.8 cm
  • Largest Crystal Size: 9mm
  • $65.00
  • O'Brien Mine
  • Cobalt
    Ontario, Canada
  • A number of larger crude and smaller sharp acanthite ps argentite crystals are present in an open space in this calcite vein, along with some pyrite crystals and hemispheres. Unusual piece from this famous silver-mining area.
SkutteruditeCobalt/Gowganda, Ontario -Various Species
  • Item #17060
  • Skutterudite
  • 7.5x3.7x2.7 cm
  • Largest Crystal Size: <1mm
  • $40.00
  • Green Meehan mine
  • Cobalt
    Ontario, Canada
  • Colloidal groupings of skutterudite that some of which, I think, are actually pseudomorphs after a previous arsenide mineral. Nice looking piece!
SideriteCobalt/Gowganda, Ontario -Various Species
  • Item #17121
  • Siderite
  • 6.4x6.7x3.8 cm
  • Largest Crystal Size: 1mm
  • $65.00
  • Cobalt
    Ontario, Canada
  • A vein of solid cobaltite cuts through diabase country rock, in this specimen. The siderite vein has some open spaces which are lined with lustrous, siderite rhombohedra. Unique!
Acanthite, ps Argentite, CalciteCobalt/Gowganda, Ontario -Various Species
  • Item #17122
  • Acanthite, ps Argentite, Calcite
  • 3.6x1.5x1.5 cm
  • Largest Crystal Size: 4mm
  • $45.00
  • O'Brien Mine
  • Cobalt
    Ontario, Canada
  • complex crystals of acanthite ps argentite associated with a hemisphere of pyrite crystals on this small plate of calcite crystals. The two minerals are also embedded in the vein. These don't come around very often!