Most of the Carrara minerals are in the form of small crystals, which can be difficult for showgoers to fully appreciate; so in order to help show the beauty of the delicate crystals of wurtzite, sphalerite, colusite, sulvanite
, rutile, quartz, tetrahedrite and many other species, excellent photos by Roberto Appiani and Matteo Chinellato were shown in sequence on the large overhead screens above the exhibition area.
In these cavities many other sulfosalts have been found: guettardite, robinsonite, zinkenite, boulangerite, semseyite, jordanite, tetrahedrite, sulvanite
, colusite, famatinite and kesterite.
It is a hydrothermal alteration product of copper-vanadium sulfides such as sulvanite
For rare mineral collectors there were some sulvanite
specimens from Tuscany, Italy, recently mined, with the Italian dealer Dr.
Just one specimen of sulvanite
has been reported from the Ceragiola area, as cubic crystals of about 1 mm, black, with a shiny metallic luster, and occurring in association with yellow sphalerite.
(1974) have reported a Ge-bearing sulvanite
, and also V-bearing and W-bearing germanites, probably related to similar phases reported from Tsumeb by Pinch and Wilson (1977).