David K. Joyce

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 18% or multiply by 0.82.

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

Safflorite, NickelineCobalt/Gowganda, Ontario -Various Species
  • Item #21512
  • Safflorite, Nickeline
  • 8.3x5.3x5.7 cm
  • Largest Crystal Size: 1mm
  • $85.00
  • Nipissing 73 Mine
  • Cobalt
    Ontario, Canada
  • This is an interesting, different one! Very elongated lobes of nickeline are coated with silver-grey safflorite crystals. The lobes are mostly safflorite but have narrow, hollow interiors that may have been filled with silver or some other mineral, at some time. The nickeline would then be some sort of pseudomorph. Looks great, anyway!
Lollingite, QuartzCobalt/Gowganda, Ontario -Various Species
  • Item #22017
  • Lollingite, Quartz
  • 3.4x3.6x4.6 cm
  • Largest Crystal Size: 2mm
  • $40.00
  • O'Brien Mine
  • Cobalt
    Ontario, Canada
  • The top of this rock matrix is covered with a botryoidal arsenide, possibly lollingite or safflorite that is in turn, thickly sprinkled with 1-2mm lollingite crystals. Interesting AND looks good!
Skutterudite, Cobaltite (Dendrite)Cobalt/Gowganda, Ontario -Various Species
  • Item #22521
  • Skutterudite, Cobaltite (Dendrite)
  • 10.6x8.0x3.8 cm
  • Largest Crystal Size: n/a
  • $75.00
  • Cobalt Lode Mine
  • Cobalt
    Ontario, Canada
  • THIS is a cool piece! You can see the thick bands of solid skutterudite on both sides of the specimen. Branching out from the skutterudite into the carbonate are dendrites of cobaltite. Dense. Interesting. Looks great.
BismuthCobalt/Gowganda, Ontario -Various Species
  • Item #29274
  • Bismuth
  • 10.2x8.2x4.4 cm
  • Largest Crystal Size: n/a
  • $45.00
  • Deer Horn Mine
  • Cobalt
    Ontario, Canada
  • A couple of sides of this specimen are covered with rich native bismuth, and very bright cleavages, in places. The sides that reveal the bismuth are actually veinlets of the mineral that were veinlets once embedded in the rock. Nice!
Safflorite, Skutterudite, NickelineCobalt/Gowganda, Ontario -Various Species
  • Item #22859
  • Safflorite, Skutterudite, Nickeline
  • 9.3x7.7x3.0 cm
  • Largest Crystal Size: 2mm
  • $75.00
  • Nipissing 404 Shaft
  • Cobalt
    Ontario, Canada
  • This specimen appears to be a botryoidal covering of safflorite with some nickeline in the interior of the botryoids, as well. The botryoidal minerals are largely covered with tiny, sparkling skutterudite crystals. Interesting specimen of these minerals.
Nickeline, Rammelsbergite, Skutterudite, SaffloriteCobalt/Gowganda, Ontario -Various Species
  • Item #22862
  • Nickeline, Rammelsbergite, Skutterudite, Safflorite
  • 6.7x6.9x3.4 cm
  • Largest Crystal Size: n/a
  • $75.00
  • Nipissing 404 Shaft
  • Cobalt
    Ontario, Canada
  • This specimen of botryoidal arsenides shows layers of nickeline, rammelsbergite and skutterudite with a thin skin of safflorite in places. Interesting AND looks great!
Lollingite, QuartzCobalt/Gowganda, Ontario -Various Species
  • Item #26731
  • Lollingite, Quartz
  • 8.3x5.2x3.3 cm
  • Largest Crystal Size: 1mm
  • $75.00
  • Siscoe Mine
  • Gwganda
    Ontario, Canada
  • This specimen shows a vein of lollingite that has had the calcite etched away to reveal botryoidal aggregates of lollinite crystals. The lollingite is all pointed, very sharp, tiny cyclic twins. Excellent example of lollingite!
Nickeline, arsenidesCobalt/Gowganda, Ontario -Various Species
  • Item #27040
  • Nickeline, arsenides
  • 1.2x1.0x0.7 cm
  • Largest Crystal Size: 2mm
  • $40.00
  • Rustex Mine
  • Cobalt
    Ontario, Canada
  • lots of sharp, hexagonal nickeline crystals on this specimen. Rarely do we see such good crystals of this nickel arsenide mineral.
Arsenopyrite on SkutteruditeCobalt/Gowganda, Ontario -Various Species
  • Item #29450
  • Arsenopyrite on Skutterudite
  • 13.5x8.3x6.8 cm
  • Largest Crystal Size: n/a
  • $125.00
  • Hudson Bay Mine
  • Cobalt
    Ontario, Canada
  • A cabinet specimen showing botryoidal skutterudite sprinkled with sparkling small arsenopyrite crystals. Dense!
SkutteruditeCobalt/Gowganda, Ontario -Various Species
  • Item #28357
  • Skutterudite
  • 4.2x3.4x2.4 cm
  • Largest Crystal Size: 11mm
  • $65.00
  • Rustex( Hudbay) Mine
  • Gowganda
    Ontario, Canada
  • The top of this matrix of unidentified, botryoidal arsenides is studded with sharp, excellent crystals of skutterudite. The cubes are typical, with kind of curved but sharp faces. We don't often see larger crystals from these deposits but here are some!
Acanthite, ps ArgentiteCobalt/Gowganda, Ontario -Various Species
  • Item #29060
  • Acanthite, ps Argentite
  • 4.2x3.9x0.9 cm
  • Largest Crystal Size: n/a
  • $75.00
  • Keeley Mine
  • South Lorrain Township
    Ontario, Canada
  • This specimen is solid silver sulphide but is really a cast after other minerals. One side is heavily slickensided, while the other is all casts of argentite after calcite crystals., showing calcite crystal imprints. There are a few argentite crystals at the edges. Very interesting!