Full description

Two cavities in a large thumbnail specimen host a mix of rare phosphates with red and salmon pink Phosphosiderite (Metastrengite) and purple Strengite.  Part of the Bloch collection, with an Si & Ann Frazier private collection label. The label gives the collector as Bill Roberts whom the mineral Robertsite was named after.

Formulas: Phosphosiderite & Strengite FePO₄ ^. 2H₂O (Dimorphs)

Product's Features

• Dimensions 30x18x28mm
• Size Thumbnail (T)