Rosell Minerales

 
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RM143   Microcline, Albite and Smoky Quartz

Montañas de Papachacra, Papachacra, Belén, Catamarca, Argentina

Group of well defined microcline crystals partially covered by minor muscovite and white albite crystal growths. Accompanied by smoky quartz crystals with a uniform smoky tone and transparence.


Size: 10,1 x 6,3 x 4,5 cm.
Main crystal: 1,8 x 1,6 cm.
Found in 2000

 

RM1793   Hematite after Magnetite (var. martite)

Payún volcano, Altiplano de Payún Matrú, Malargüe, Mendoza, Argentina

Group of doubly terminated crystals of pseudomorphic hematite after magnetite, elongated and with defined faces and edges. They show exceptional skeletal growths, very marked and partially coated by recrystallizations of small crystals of lenticular hematite. The crystals were formed in the fumaroles of this enormous Argentinian volcano. The Payún Matrú is a large volcano with an intermediate morphological type between a volcanic shield and a stratovolcano, that is located 530 km from the oceanic fosa and marks the subduction zone of the Nazca plate. Currently this area is a national park and collecting minerals is prohibited.

 


Size: 8.5 x 5.0 x 4.3 cm.
Found in 2008

 
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