Microcline var. Amazonite - Crystal Peak area, Park and Teller Cos., Colorado, USA
(#MINS9001)
Nice blue amazonite crystal 2,3 cm tall, fully terminated on with albite in association.
Specimen weight:50 gr.
Crystal size:2,3 cm tall
 Overall size:53mm x 27 mm x 38 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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Chalcocite and calcite - Idaho Springs Distr. - Clear Creek Co - Colorado
(#GM22060)
Some dark grey crystals of chalcocite are stunning over the matrix that is covered by greyish crystals of calcite.
Specimen weight:75 gr.
Crystal size:mm. 8
Overall size:50mm x 27 mm x 10 mm
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