Boracite on Hilgardite
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Boracite on Hilgardite
Boulby Mine, Loftus, North Yorkshire, England
2596
Bright crystalline balls of boracite richly formed over small areas of orange Hilgardite. Borate specimens are difficult to come by nowadays as Boulby no longer mines the sylvinite seam in which the borates occurred.
Formulas: Hilgardite Ca2B5O9Cl . H2O; Boracite Mg3B7O13Cl
£24.00
Status: Available
Dimensions: 31x23x11mm
Size: Thumbnail (T)
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