Hilgardite on Boracite
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Hilgardite on Boracite
Boulby Mine, Loftus, North Yorkshire, England
1695
Thumbnail with dusting of small orange Hilgardite crystals on two generations of boracite. Borate specimens are difficult to come by nowadays as the mine has stopped working the Sylvinite seam in which the borates occurred.
Formulas: Hilgardite Ca2B5O9Cl . H2O; Boracite Mg3B7O13Cl
Status: Sold
Dimensions: 27x18x16mm
Size: Thumbnail (T)
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