Origin: Sjögruvan, Grythyttan, Örebro, Sweden (type locality)
Sample size: 2 x 2 x 1 cm
Origin: Varenche mine, St. Barthelemy, Aosta, Val d'Aosta, Italy
Sample size: 5 x 4 x 2.5 cm
Brown crystalline grains in matrix to 1 mm with
berzeliite (XRD confirmed)
Origin: Långban, Vermland, Sweden
Sample size: 4 x 3 x 4 cm
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