David K. Joyce

Allargentum, Silver

1.7x1.4x1.3 cm
Kerr Lake Mine
Ontario, Canada

Allargentum, SilverAllargentum, Silver

Item number: 27024

Well, allargentum is not a common mineral! It looks very much like silver but, unlike silver, it has cleavage. Silver does not! At Cobalt, allargentum occurs in masses and as lamellae in native silver. Note the triangular cleavage markings on many of them. Rare! This allargentum appears to have been torqued during breakage and shows lots of small cleavage planes on one side. Rich!