Hilgardite

  

  

 

     

 

Hilgardite on boracite with magnesite

 

Hilgardite on boracite with magnesite

Origin: Boulby Potash Mine, Loftus, Cleveland, North Yorkshire, England
ex. Tim Sherburn Collection

Sample size: 9 x 6.5 x 4 cm, crystals to 5 or 6 mm (top 4),  9 x 6 x 3 cm (3rd row), 3.5 x 3 x 2 cm (4th row), 5 x 3 x 3 cm  (5th/6th row)

 

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Origin: Boulby Mine, Loftus, Cleveland, Great Britain

Sample size: 2.1 x 3 cm specimen. Brownish-orange hilgardite with greenish clear boracite crystals. Sprays of hilgardite are up to 1 mm wide (top), 1.5x2.5 cm specimen. Sub-mm reddish orange crystals on boracite

 

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Pink micro crystals of hilgardite occuring with and in light blue cubic boracite crystals. The spherules are to 2 mm.

Origin: Boulby Potash mine, Loftus, Cleveland, England

Sample size: 6 x 6 x 3 cm

 

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Hilgardite (4-M) and parahilgardite (3TC) on boracite

  

Hilgardite on boracite

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