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RM1397   Autunite and torbernite

Cunha Baixa Mine, Cunha Baixa, Mangualde, Viseu, Portugal

Groups of autunite tabular crystals with an intense and characteristic yellow color, brilliance, transparent, some of them growing epitaxial on torbernite (metatorbernite). They are disposed covering cavities of a matrix of goethite. An old specimen from a classic Portuguese locality.


Size: 7.3 x 6.8 x 4.5 cm.
Found in 1980's.

Fluorescent under LWUV and SWUV
Presents radioactive activity.


 

RM1812   Saléeite - Metasaléeite

Cunha Baixa Mine, Cunha Baixa, Mangualde, Viseu, Portugal

Groups of tabular saléeite to metasaléeite crystal aggregates, with a characteristic greenish-yellow color, transparent to translucent, due to the loss of water. The shade is much more greenish than the autunite.

 


Size: 6.0 x 5.4 x 4.6 cm.
Main crystal: 3 x 2 mm.
Found in ca. 1990.

Col. J.M. Manchión (Barcelona). Label Joan Viñals.


 
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