Barysilite

  

Masses of pink platy crystals embedded in matrix, XRD confirmed

Origin: Franklin, Sussex Co., New Jersey, United States

Sample size: 4 x 4 x 4 cm

 

  

 

  

Tiny pearly white, flat lying, platy crystals covering most of fracture.

Origin: Långban, Varmland, Sweden

Sample size: 3 x 2 x 2.3 cm (top), 5.5 x 3 x 3 cm (bottom)

 

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This specimen has a zone of mineralization where native lead and copper have been altered to a potpourri of mineral species! Barysilite occurs as thin, colourless hexagonal plate shaped crystals - both as isolated and and clumped groups. The largest crystals are about 2 mm across. Also present are native lead with hydrocerussite alterations and there may be some native copper still with alteration products of green malachite and jet black tenorite. Lastly are found tabular shaped crystals of nadorite. It is not clear where in the mine this specimen was found but the Flink lineage supports a possibility of it coming from the Japan or Lukas workings.

  

  

  

This specimen was found on the dumps by the famous Långban collector Roland Eriksson. The rock is comprised of hematite with a minor magnetite component, garnet and calcite. There is a 2.3 x 1.6 cm area (exposed vug) that is very heavily mineralized with crystals of barysilite. The crystals are thin bladed hexagonal in shape and reach up to about 1.5 mm across. There are literally hundreds of them on this specimen.

Origin: Långban, Sweden
Harry von Eckermann Collection

Sample size: 8 x 5.5 x 4 cm (top/2nd row), 5 x 4.2 x 3.2 cm (3rd/4th/bottom row)

 

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White shiny coatings on hematite

Origin: Långban, Värmland, Sweden

Sample size: micromount

 

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Matrix partly coated on top by white masses of barysilite and minor hydrocerussite.

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