Althausite in Serpentine
specimen number:
2354268
location:
Modum, Buskerud, Norway
description: The Modum region in Buskerud, Norway, is characterized by metamorphic rocks hosting small magnesite and serpentine bodies, famous historically for cobalt mining at operations like the Modum Mines during the eighteenth and nineteenth centuries. Mineral collectors and researchers have long valued these quarries for their unique phosphate occurrences. Among these discoveries, the rare magnesium phosphate mineral althausite was first described from the local Tingelstadtjern deposit, typically occurring as grey to brownish cleavable masses within the serpentinite matrix that can alter to apatite over time.
Gray masses of althausite fairly rich throughout a green serpentine matrix.
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