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 19% or multiply by 0.81.

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!
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!
Silver, SaffloriteCobalt/Gowganda, Ontario -Various Species
  • Item #19902
  • Silver, Safflorite
  • 3.8x3.2x3.0 cm
  • Largest Crystal Size: n/a
  • $65.00
  • Hudson Bay(Rustex) Mine
  • Gowganda
    Ontario, Canada
  • This specimen is a vein section that has dolomite on one side and calcite in the middle. Some of the calcite has been etched way to better reveal the botryoidal safflorite that has silver splashed between the botryoids or in veinlets in the dolomite. Interesting and rich!
Silver, SkutteruditeCobalt/Gowganda, Ontario -Various Species
  • Item #20850
  • Silver, Skutterudite
  • 8.5x6.2x4.8 cm
  • Largest Crystal Size: n/a
  • $140.00
  • Beaver Mine
  • Cobalt
    Ontario, Canada
  • This specimen is mostly composed of bladed crystals of safflorite arranged in hemispherical aggregates, TOTALLY laced through with native silver, which sticks out as hacly barbs all over. Some tiny skutterudite crystals here and there on the safflorite. VERY high grade! Heavy and nice!
Safflorite, NickelineCobalt/Gowganda, Ontario -Various Species
  • Item #21512
  • Safflorite, Nickeline
  • 8.3x5.3x5.7 cm
  • Largest Crystal Size: 1mm
  • $120.00
  • 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!
AcanthiteCobalt/Gowganda, Ontario -Various Species
  • Item #21728
  • Acanthite
  • 6.2x4.0x2.2 cm
  • Largest Crystal Size: 1mm
  • $40.00
  • Cobalt Lode Mine
  • Cobalt
    Ontario, Canada
  • Calcite has been etched away to reveal a mesh of acanthite crystals and acanthite crystal casts after calcite. Not common.
Nickeline, BreithauptiteCobalt/Gowganda, Ontario -Various Species
  • Item #21730
  • Nickeline, Breithauptite
  • 6.5x4.8x1.5 cm
  • Largest Crystal Size: n/a
  • $45.00
  • Cobalt
    Ontario, Canada
  • This is very interesting! This sliced piece shows an arsenide assemblage consisting of a core of pinkish-metallic breithauptite with and outer coating of orangey-metallic nickeline. Excellent example of these two different antimony phases. Rich!
Silver, Nickeline, BreithauptiteCobalt/Gowganda, Ontario -Various Species
  • Item #21736
  • Silver, Nickeline, Breithauptite
  • 9.0x5.4x0.7 cm
  • Largest Crystal Size: n/a
  • $65.00
  • HiHo Mine
  • Cobalt
    Ontario, Canada
  • This specimen is sawn on both sides to reveal very rich native silver occurring in carbonates and nickeline with a smattering of breithauptite. Rich and interesting vein section.