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Messelite from
State Forest Quarry #2 (State Forest No. 2 Mica Mine), Cobalt, East Hampton (Chatham), Middlesex Co., Connecticut, USA

Classification
Species:Messelite
Formula:Ca2Fe2+(PO4)2 · 2H2O
Comments:"Many solid white or tan masses, with a curved lamellar structure, were collected; some were two inches across. The messelite was intergrown with siderite, or embedded in triphylite. Distinct crystals, with a pearly luster, were noted in vugs of the massive mineral." Schooner (1961). Associated with triphylite, siderite, strunzite, laueite, mitridatite, ludlamite, vivianite.

A green mineral thought to be beraunite was tested by XRD (with some matrix) at the National Museum Prague (dr. Jiri Sejkora) and found to be "no beraunite but something similar to messelite". The green may be only a coating.
Habit:massive curved, lamellar aggregates, acicular microcrystals
Colour:white to tan, sometimes a green coating of an unknown.
Abundance at site:Rare
Confirmation
Validity:Confirmed
Confirmation Methods:XRD
References
References:Schooner (1961)
Associated Minerals Based on Photo Data:
Triphylite3 photos of Messelite associated with Triphylite at this locality.
Beraunite1 photo of Messelite associated with Beraunite at this locality.
Vivianite1 photo of Messelite associated with Vivianite at this locality.
Data
Mineral Data:Click here to view Messelite data
Locality Data:Click here to view State Forest Quarry #2 (State Forest No. 2 Mica Mine), Cobalt, East Hampton (Chatham), Middlesex Co., Connecticut, USA
 
Mineral and/or Locality  
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