Arseniosiderite

Ca₂Fe³⁺₃O₂(AsO₄)₃·3H₂O

Arseniosiderite occurs rarely as small radiating hemispheres of orange or reddish-brown crystals.

Selected Australian Occurrences:

• Kintore Open Cut and Block 14 Open Cut, Broken Hill, New South Wales.
• Dome Rock, South Australia.
• Mount Malvern Mine, Mount Lofty Ranges, South Australia.
• Marda Project, Western Australia.