This specimen showcases well-formed, white botryoids of franconite on grey weloganite, the type locality for both species. Collected by A. P. Sabina in 1978 and gifted to Dr. Tarassoff in 1981, it was officially recognized as a new mineral species in 1984, in part due to Sabina's research. Franconite occurs as white globules on weloganite crystals, and less commonly on calcite or quartz, in vugs within a dawsonite-bearing sill in the Francon limestone quarry. These globules consist of radiating bladed crystals with a vitreous lustre and white streak, collectively imparting a silky lustre to newly split surfaces. An elusive species!
Ref: The Canadian Mineralogist (1984) 22 (2): 239–243.
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