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RM437   Quartz with pyrophyllite
SiO₂
  -  4. Oxides and hydroxides

A brilliant quartz crystals from a well known Catalan area, in the Pyrenees, very appreciated for the quality of its hyaline crystals. A rich group of quartz crystals showing a elongated prism and developed and deformed rhombohedral terminal faces. We also observe some of them doubly terminated, highlighting one of them because of their size. Transparence and brilliance are excellent, with very well defined faces and edges. They are partially covered by small aggregates of pyrophyllite, between colorless to slightly yellow, with some goethitized pyrite. No damage. This sample is a nice representative of the known Llavorsí's quartz crystals.

Size: 7,1 x 6,5 x 5,5 cm.
Main crystal: 4,4 x 1,6 cm.
Found in 2009
Precio reducido-Reduced price 145€
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RM340   Cobaltoan calcite
Ca(CO3)
  -  5. Carbonides and nitrates

A huge size cobaltoan calcite specimen showing concretionary growths with a good and deep color and covering white aragonite aggregates. The mineralization is filling fissures of the Triassic conglomerates, which are very visible in this specimen.

Main side shows a polished section where we can enjoy perfectly banded purple calcite and conglomerate individual clasts. Nowadays mine is partially collapsed and restored and it is impossible to get specimens.

Size: 13,0 x 5,5 x 1,0 cm.
Found in ca. 2005
Fluorescent under long wave UV
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