Volkovskite & Hilgardite

Boulby Mine, Loftus, North Yorkshire, England


Cross-section of mica like bladed Volkovskite formed over a small hemisphere of aggregated Hilgardite crystals. Unusual combination of two rare borates from the find of exceptional volkovskites 7 or 8 years ago at Boulby mine in Yorkshire. Ex. M. Freier collection

Formula: Volkovskite KCa4[B5O8OH]4[B(OH)3]2Cl . 4H2O; Hilgardite Ca2B5O9Cl . H2O

Status: Sold

Dimensions: 45x28x21mm

Size: Miniature (M)

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