Calcite
Floater group of scalenohedral XX covered by small calcite XX
12x9cm 
Barega mine, Gonnesa, Carbonia-Iglesias. Italy
Specimen n.696

Calcite
Pearly semitransparent scalenohedron up to 4.5 cm long
12x10cm 
Barega mine, Gonnesa, Carbonia-Iglesias. Italy
Specimen n.989

Another photo: entire piece

Baryte
Some tabular XX, (edge max 2cm), semitransparent and pale blue, on calcite
12x7cm
Barega mine, Gonnesa, Carbonia-Iglesias. Italy
Specimen n.418

Another photo: a bigger and different view

Baryte
Tabular XX of baryte up to 2 cm long, on calcite
12x9cm
Barega mine, Gonnesa, Carbonia-Iglesias. Italy
Specimen n.921

Baryte
White XX of barite, up to 5.7 cm long, partially immersed in calcite
14x9.5cm
Barega mine, Gonnesa, Carbonia-Iglesias. Italy
Specimen n.1379

Sphalerite
Mass of sphalerite XX, with small galena XX (up to 0.2cm wide) with skeletal formation
12x7cm
Sedda Moddizis mine, Gonnesa, Carbonia-Iglesias. Italy
Specimen n.493

Another photo: entire piece

Baryte
Semi-transparent pale green XX, without matrix
11x9cm
Silius, Cagliari. Italy
Specimen n.497

Another photo: back of this piece

Baryte
Mass of tabular XX, reddish for iron impurities, grown over a dissolved formation (in the 3rd photo it is possible to see the hollow cast, in the back)
10.5x9cm
Silius, Cagliari. Italy
Specimen n.909

Another photo: entire specimen
Another photo: back of piece, with hollow cast

Calcite
Fat X, 4cm wide, partially corroded, translucent for clay inclusions, on a matrix covered by small calcite XX. It is a typical shape from this mine (Ag-rich galena; located east of Gonnesa, not far from Barega mine)
8x7.5cm 
Onixeddu mt., Gonnesa, Carbonia-Iglesias. Italy
Specimen n.1233