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Arfvedsonite - Sold

Aegirine is an iron sodium silicate mineral, a member of the amphibole group (Hawthorne et al. 2012). Brooke (1823) named the species after Johan Arfwedson (1792-1841), Swedish chemist who discovered lithium.

This is a lustrous black single crystal of arfvedsonite. The interfacial angle approximating 120° distinguishes this crystal from the similar appearing species aegirine. At Mount Malosa, aegirine is significantly more abundant than arfvedsonite. This arfvedsonite crystal is doubly terminated; one end is well formed while the other appears to have detached from matrix and re-healed.