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Hureaulite, sicklerite, vivianite, rockbridgeite and phosphoferrite - Mangualde - Viseu - Portugal
(#GM24065)
A small encyclopedia of minerals, where however only hureaulite is easily recognizable.
Most of the surface of this specimen is covered with orange/light brown crystals of hureaulite.
To identify the other minerals you need ...
Specimen weight:50 gr.
Crystal size:mm. 4
 Overall size:56mm x 43 mm x 22 mm
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Pascoite and metarossite - Sunday #2 mine - Carnation mine Group - Slick Rock Mining Distr. - San Miguel County - Colorado - United States
(#GM24054)
A crust of mini granules covers the surface of this specimen.
The orange colored areas are pascoite, the yellow-green ones are metarossite.
Former mineralogical collection of Sandro Maggia: no. P-85.
Specimen weight:62 gr.
Crystal size:mm. 2
Overall size:53mm x 35 mm x 29 mm
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Colemanite - Bigadic, Marmara Region, Turkey
(#FERR1455)
Fine cluster of snow white colemanite in excellent conditions from a turkish mine that produced many world class samples for this not so common borate in the past.
Former S. Maggia collection, with label.
Specimen weight:372 gr.
Crystal size:1.2 cm
Overall size:120mm x 70 mm x 55 mm
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Owner : GMineral (Voghera - Italy) 