Strüverite

White (??) single crystal, from a 19th century find
Origin: Liim Fjord, Denmark
Sample size: 2 x 5 cm
 

Photo courtesy of: 

Diederik Visser

Diederik Visser Minerals & Petrological Services

 

  
Origin: Samiresy, Sahatany Pegmatite Field, Antananarivo Province, Madagascar
Sample size: 4.0 x 2.8 x 2.6 cm
 

Photo courtesy of: 

Rob Lavinsky

The Arkenstone

 

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