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 20% or multiply by 0.8.

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!
Nickeline, DolomiteCobalt/Gowganda, Ontario -Various Species
  • Item #16568
  • Nickeline, Dolomite
  • 6.3x4.9x3.6 cm
  • Largest Crystal Size: n/a
  • $40.00
  • Nipissing 404 Mine, 73 Shaft
  • Cobalt
    Ontario, Canada
  • Mostly solid nickeline with a patch of pink dolomite in the middle. Annabergite staining on the outside. Rich!
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.
LollingiteCobalt/Gowganda, Ontario -Various Species
  • Item #17043
  • Lollingite
  • 11.0x6.8x3.9 cm
  • Largest Crystal Size: 1mm
  • $65.00
  • Langis Mine
  • Casey Township
    Ontario, Canada
  • A large, heavy specimen of massive lollingite which has its top covered with sort of botryoidal mounds of lollingite crystals. The botryoids are composed of aggregates of six-sided, twinned lollingite crystals. The is a little silver present and another bladed arsenide that I don't know what it is it.
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!
Lollingite, SilverCobalt/Gowganda, Ontario -Various Species
  • Item #17079
  • Lollingite, Silver
  • 16.0x11.0x5.5 cm
  • Largest Crystal Size: n
  • $95.00
  • Castle Mine
  • Casey Township
    Ontario, Canada
  • This specimen features crystallized silver coated with a thick layer of crystallized lollingite, preserving the structure of the silver. It is BIG and will require extra postage. Nice large cabinet specimen from a classic locality.
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!