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- Availability
- Sold
- Featured
- Featured in Special Editions
- Locality
- Silverfields mine, Cobalt dist., Ontario, Canada
- Formula
- PbS
- Size
- 9.5 x 8 x 1 cm - Cabinet
- Tagged
- Ore Minerals
Excellent slab of Galena with Arsenopyrite and Chalcopyrite mostly likely from Petruk's group 5 mineralization, the Fe-As assemblage. This assemblage is characterized be a high content of Arsenopyrite. Cobalt was a world class Silver deposit which was discovered by a blacksmith in 1903. The pop-up photos show some unique and unusual ore textures.
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- Sold
- Featured
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- Locality
- Hi-Ho Silver mine, Cobalt dist., Ontario, Canada
- Formula
- NiAs
- Size
- 6.5 x 4 x 1 cm - Sm Cabinet
The Cobalt district is located within the Superior structural province of the Canadian Shield. Two distinct suites of minerals and age of mineralization occur throughout the region. The older are base metal sulfides associated with Archean volcanics and are classified as stratiform and syngenetic. The younger are the ore suites consisting of silver-cobalt-nickel-arsenic assemblages hosted within Archean volcanics and Huronian rocks and are fissure fillings and replacement veins. It was found through detailed research of ore samples that five typical assemblages of arsenides occur in specific parts of the ore veins at Cobalt. This specimen belongs to group 2, the Ni-Co-As assemblage, which typically contains a high Silver content and a predominance of nickel and cobalt arsenides. These assemblages were defined by William Petruk in the 1960's and published in "The Silver-Arsenide Deposits of the Cobalt-Gowganda Region, Ontario" (MAC). This specimen contains abundant Nickeline and Safflorite. It is a sawed and polished on one side which shows well the rosettes and veinlets of the ore minerals.
- Availability
- Available
- Price
- $45.00
- Locality
- Keeley-Frontier mine, Cobalt dist., Ontario, Canada
- Formula
- Ag
- Size
- 1 x 1 x 0.7 cm - Thumbnail
- Tagged
- native element
Wire silver curls to 2mm on Acanthite.
- Availability
- Available
- Price
- $30.00
- Locality
- Cobalt dist., Ontario, Canada
- Formula
- Ag
- Size
- 3 x 4 x 2.5 cm - Miniature
- Tagged
- native element
Groups of bladed Safflorite with a 1mm Silver crystal.
- Availability
- Available
- Price
- $95.00
- Locality
- Keeley-Frontier mine, Cobalt dist., Ontario, Canada
- Formula
- Ag
- Size
- 12.5 x 5 x 1 cm - Cabinet
- Tagged
- native element
Slab with pervasive arborescent Silver veining.
- Availability
- Sold
- Featured
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- Locality
- Deer Horn mine, Cobalt dist., Ontario, Canada
- Formula
- Ag
- Size
- 7 x 4 x 1.5 cm - Sm Cabinet
- Tagged
- Ore Minerals
Cobalt district ores occur in distinct mineral assemblages as outlined by William Petruk in the 1971 publication "The Silver-Arsenides of the Cobalt-Gowganda Region, Ontario". This specimen fits well in group 2 of Petruk's which contain high Silver and Allargentum. It is sawed and polished on one side. The Silver is easily seen in matrix as well as the brassy luster of the Nickeline and Breithauptite.