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Description: | Mineral hand specimen comprising lustrous tetrahedral turquoise-coloured crystals of Boracite, associated with pink hilgardite, from the Boulby Potash Mine, Loftus, Cleveland (NE England). Collected by Lindsay Greenbank, January 1994.
Hilgardite (the pink mineral), is an evaporite, which formed as the result of the evaporation of sea water. In this case, approximately 250 million years ago during the Permian period, as the warm, salty Zechstein Sea off the North East coast of England dried up. The turquoise mineral is boracite, which is also an evaporite. This specimen is from Boulby Potash Mine, Loftus, in Cleveland.
The specimen was found in NE England. | Publisher: | Tyne & Wear Archives & Museums | Subjects: | Greenbank Lindsay Classification: Boracite | Temporal: | Permian period (290 - 248 million years ago) | Source: | Tyne & Wear Archives & Museums | Identifier: | http://www.twmuseums.org.uk/geofinder/se... | Go to resource |
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