Boulangerite
Thin XX of boulangerite, around some XX of black sphalerite, on a matrix covered by small XX of  calcite
10x6cm
Bottino mine, Stazzema, Lucca. Italy
Specimen n.1251

Another photo: a bigger view
Another photo: entire piece

Galena
Complex X of galena (combination of tabular XX and cube-octahedron),1 cm wide, within quartz and siderite
4x6cm
Bottino mine, Stazzema, Lucca. Italy
Specimen n.194

Another photo: a bigger view
Another photo: entire piece

Meneghinite
Some XX of meneghninite, immersed in the mineralized matrix with minor siderite and calcite
7x5cm
Bottino mine, Stazzema, Lucca. Italy
Specimen n.59

Another photo: a bigger view
 

Quartz
Black biterminated X 2.7cm long, on gypsum matrix. The black color is due to bitumen inclusion. It comes from a small area of Apennines, with occurrences of anydrite veins in the triassic evaporites, with black quartz, gypsum, pyrite, hematite
10x5.4cm
Camporanda, Sillano, Garfagnana, Lucca. Italy
Specimen n.311

Sphalerite
Bright black X, twinned, 0.4cm long. On the piece threre are some others smaller XX, as it is possible to see from the 2nd photo
4x4cm
Bottino mine, Stazzema, Lucca. Italy
Specimen n.514

Another photo: a wider view on the piece

Sphalerite
Small XX of sphalerite, up to 0.2cm long, with XX of ankerite-siderite. The XX are very bright
3.5x7cm
Bottino mine, Stazzema, Lucca. Italy
Specimen n.536

Dawsonite
Brown carbonatic rock with many radiating XX of dawsonite
8x4cm
Solforate mine, Piancastagnaio, monte Amiata. Siena. Italy
Specimen n.135

Another photo: entire piece

Stibnite
Thin prismatic XX up to 2.5cm, in calcite matrix from this old antimony mine
10x11.5cm
Le Cetine di Cotorniano mine, Siena. Italy
Specimen n.755

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Aragonite
Orange to red aragonite, a sort of stalactite
13x10cm
Rapolano, Siena. Italy
Specimen n.328

Fluorite
Glassy cubic XX 0.4cm long, in marble cavity
6x4.5cm
Colonnata quarry, Massa Carrara. Italy
Specimen n.665

Fluorite
Transparent X, edge 1cm, with some white adularia, in a typical cavity of the marble. the X is notably transparent
7x8cm
Fantiscritti quarry, Massa Carrara. Italy
Specimen n.291

Another photo: entire piece

Quartz
Transparent X, 1.7cm long, with adularia XX, on the marble
6.5x4cm
La Facciata quarry, Massa Carrara. Italy
Specimen n.737

Arezzo prov. 

Aragonite
Small geode with acicular XX of colorless aragonite up to 0.2cm, a typical formation from this locality (see also the kutnohorite specimen below)
3.5x2.4cm
Levane, Valdarno, Arezzo. Italy
Specimen n.199

Kutnohorite
Shallow cavity with hemispherical black kutnohorite and small elongated XX of colorless aragonite. In this locality the mineral is quite different from the white formation found otherwhere (I have a kutnohorite piece from Gambatesa mine)
2x1.5cm
Levane, Valdarno, Arezzo. Italy
Specimen n.51

Another photo: entire piece

Pisa prov. 

Barian Celestine
White elongated lamellar XX, up to 4cm, on a septarian formation in limestone, altered by hydrotermal action. It is a celestine variety (from this place) very rich in barium (I rely on a book that quotes this locality)
8.5x8cm
Orciatico, Lajatico, Pisa. Italy
Specimen n.472

Chalcedony
Mass of botryoidal chalcedony, from and old quarry
12x14cm
Poggio Castiglione, Canneto, Pisa. Italy
Specimen n.1239