Italy, Toscana, Grosseto prov., Massa Marittima, Niccioleta mine


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Niccioleta mines are very famous mostly for pyrite crystals (often typically striated and elongated, like the first photo in this page), but also for other minerals, such as gypsum and sulphur too. The minerals can be found in two different occurrences: a group related with the main ore minerals, and another group in the skarn occurrence

 

Celestine
Group of celestine XX, the one in evidence is 2 cm long, without damages. Celestine stands on a small mineralized matrix
3.5x3cm
Niccioleta mine, Grosseto. Italy
Specimen n.1293

2nd photo

 

 

Celestine
Pale blue XX of celestine, on a matrix with celestine and calcite
5x3cm
Niccioleta mine, Grosseto. Italy
Specimen n.179

Another photo: entire piece

 

Gypsum (selenite)
Semitransparent X (dimension: 8.5x7cm) well terminated, on calcite matrix with some small XX of quartz. On a corner there is a cubic X of pyrite, with natural fractures, 2.5cm long. It is a typical sample from this mine, collected at the beginning of the 80's
9.5x7cm
Niccioleta mine, Grosseto. Italy
Specimen n.151

Another photo: a different view

 

Gypsum (selenite)
Large X, with pyrite small XX. Inside the X it is possible to see clay inclusions, the gypsum is very transparent
12x7cm
Niccioleta mine, Grosseto. Italy
Specimen n.1282

2nd photo
3rd photo: a different view




Gypsum (selenite)
Group of XX up to 13 cm long, with some small pyrite XX. There are also some pale blue baryte xx up to 2cm wide
18.5x11cm
Niccioleta mine, Grosseto. Italy
Specimen n.1281

2nd photo
3rd photo
4th photo
5th photo

 


Gypsum (selenite)
Transparent X of selenite, well terminated, 2.7cm long, on gypsum matrix
3.6x2.8cm
Niccioleta mine, Grosseto. Italy
Specimen n.152

 

Gypsum (selenite)
Two well formed XX, up to  3cm on edge, on piritic matrix
3.7x5cm
Niccioleta mine, Grosseto. Italy
Specimen n.154



Gypsum (selenite)
Floating X, edge up to 4.7cm, covered by small XX and grains of pyrite 
6.5x4cm
Niccioleta mine, Grosseto. Italy
Specimen n.153

2nd photo
3rd photo

 

Gypsum (selenite)
Prismatic XX, floating (it is the combination of two twinned XX), 10cm tall
10x2cm
Niccioleta mine, Grosseto. Italy
Specimen n.157

 

Gypsum (selenite)
Prismatic X of Gypsum, with some sulphur and limestone. Near the tip there is a group of smallest XX, curved as often occurs with gypsum (see the other photo)
13x5cm
Niccioleta mine, Grosseto. Italy
Specimen n.158

See another view

 

Pyrite
An aggregate of cubic XX, edge max 1.5cm, on compact pyrite. This kind of XX, striated (called "triglifa" in Italian) and elongated, were typical for this mine
13x7.5cm
Niccioleta mine, Grosseto. Italy
Specimen n.6

2nd photo: entire piece




Pyrite
Combination of cubic XX, edge max 3.8cm
6x3.9cm
Niccioleta mine, Grosseto. Italy
Specimen n.4

2nd photo

 


Pyrite
Cubic X, edge of 2.3cm, on a cavity covered by micro-crystalline aragonite, fluorescent in red; the cavity is 6x8cm wide, in a block of massive pyrite
14.5x12cm
Niccioleta mine, Grosseto. Italy
Specimen n.1

 

Pyrite
Cubic XX, grown together, edge max 3.8cm
11x10cm
Niccioleta mine, Grosseto. Italy
Specimen n.5

 

Pyrite
Cubic intergrowing  XX , the biggest is 8.5 x 6.5 cm, with a small hematite rosette on a corner
15x12cm
Niccioleta mine, Grosseto. Italy
Specimen n.7

2nd photo
3rd photo
4th photo

 

Pyrite
Complex shaped XX, edge  max 4cm
5.5x5cm 
Niccioleta mine, Grosseto. Italy
Specimen n.3

2nd photo
3rd photo

 

Pyrite
Cubic XX of striated pyrite (triglifa) covered (maybe epitaxy) by complex XX of galena. There is also minor sphalerite
8.5x12cm 
Niccioleta mine, Grosseto. Italy
Specimen n.409

2nd photo
3rd photo: close up view
4th photo: close up view

 

 

Pyrite
Cubic XX, edge  max 2cm, covered by very small XX of sphalerite and some galena grains (see the 2nd photo)
8.5x7cm 
Niccioleta mine, Grosseto. Italy
Specimen n.1249

2nd photo
3rd photo

 

Pyrrothite
Hexagonal XX with edge up to 1.8cm, on pyrite. A small truncated octahedral of fluorite
5x4cm
Niccioleta mine, Grosseto. Italy
Specimen n.531

2nd photo
3rd photo
4th photo

5th photo

 

 

Quartz
Some XX, two of them are hyaline, max 4.5. There are some 1st generation XX, like the two in the photo, partially covered by 2nd generation quartz, with small XX
10.5x8cm
Niccioleta mine, Grosseto. Italy
Specimen n.214

Another photo: entire piece

 

Sulphur
Fat XX of sulphur on mineralized matrix. The XX are up to 1.3 an wide
13x8cm
Niccioleta mine, Grosseto. Italy
Specimen n.1283

Sulphur
Nice XX,  edge max 0.4 cm. some of them have a skeletal appearance. The XX are posted on a pale blue, gray celestine matrix. Old piece from this mine
4x4.5cm
Niccioleta mine, Grosseto. Italy
Specimen n.172

2nd photo: entire piece
3rd photo

 


 

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