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Castagno prospects (Migliarino and Forra prospects), Il Castagno, Gambassi Terme, Metropolitan City of Florence, Tuscany, Italyi
Regional Level Types
Castagno prospects (Migliarino and Forra prospects)Group of Prospects (Overgrown)
Il CastagnoVillage
Gambassi TermeCommune
Metropolitan City of FlorenceProvince
TuscanyRegion
ItalyCountry

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Latitude & Longitude (WGS84):
43° 31' 9'' North , 10° 57' 6'' East
Latitude & Longitude (decimal):
43.51944,10.95169
GRN:
N30E06
Type:
Group of Prospects (Overgrown) - last checked 2026
Deposit first discovered:
1845
Köppen climate type:
Cfb : Temperate oceanic climate
Nearest Settlements:
PlacePopulationDistance
Gambassi Terme2,061 (2014)1.8km
Montaione2,770 (2014)4.7km
Pancole105 (2014)4.9km
Pillo107 (2014)5.1km
Badia a Cerreto904 (2014)6.6km
Mindat Locality ID:
126103
Long-form identifier:
mindat:1:2:126103:8
GUID (UUID V4):
0
Other/historical names associated with this locality:
Il Castagno mine
Name(s) in local language(s):
Miniera del Castagno (Migliarini e Forra), Gambassi Terme, Siena, Toscana, Italia


Old copper prospects in ophiolites (serpentinite). The first explorations date back to 1845, and operations began in 1855, but were soon suspended.
Work resumed in 1889 and ended in 1895; some explorations were conducted between 1918 and 1921.
Currently, the mine galleries are inaccessible; only ruins and some dumps are visible.

Map references:
CT Regione Toscana 1:10000 table 285080
Coordinates = estimated position of the Forra prospect according to


Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


14 valid minerals.

Detailed Mineral List:

ⓘ Aurichalcite
Formula: (Zn,Cu)5(CO3)2(OH)6
ⓘ Azurite
Formula: Cu3(CO3)2(OH)2
ⓘ Bornite
Formula: Cu5FeS4
ⓘ Calcite
Formula: CaCO3
ⓘ Chalcocite
Formula: Cu2S
ⓘ Chalcopyrite
Formula: CuFeS2
ⓘ Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
ⓘ Chrysotile
Formula: Mg3(Si2O5)(OH)4
ⓘ Covellite
Formula: CuS
ⓘ Goethite
Formula: Fe3+O(OH)
ⓘ Gypsum
Formula: CaSO4 · 2H2O
ⓘ 'Limonite'
ⓘ Malachite
Formula: Cu2(CO3)(OH)2
ⓘ Quartz
Formula: SiO2
ⓘ Sphalerite
Formula: ZnS

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘChalcocite2.BA.05Cu2S
ⓘBornite2.BA.15Cu5FeS4
ⓘCovellite2.CA.05aCuS
ⓘSphalerite2.CB.05aZnS
ⓘChalcopyrite2.CB.10aCuFeS2
Group 4 - Oxides and Hydroxides
ⓘGoethite4.00.Fe3+O(OH)
ⓘQuartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘAzurite5.BA.05Cu3(CO3)2(OH)2
ⓘMalachite5.BA.10Cu2(CO3)(OH)2
ⓘAurichalcite5.BA.15(Zn,Cu)5(CO3)2(OH)6
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘGypsum7.CD.40CaSO4 · 2H2O
Group 9 - Silicates
ⓘChrysotile9.00.Mg3(Si2O5)(OH)4
ⓘChrysocolla9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Unclassified
ⓘ'Limonite'-

List of minerals for each chemical element

HHydrogen
Hⓘ Aurichalcite(Zn,Cu)5(CO3)2(OH)6
Hⓘ AzuriteCu3(CO3)2(OH)2
Hⓘ ChrysotileMg3(Si2O5)(OH)4
Hⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Hⓘ GoethiteFe3+O(OH)
Hⓘ GypsumCaSO4 · 2H2O
Hⓘ MalachiteCu2(CO3)(OH)2
CCarbon
Cⓘ Aurichalcite(Zn,Cu)5(CO3)2(OH)6
Cⓘ AzuriteCu3(CO3)2(OH)2
Cⓘ CalciteCaCO3
Cⓘ MalachiteCu2(CO3)(OH)2
OOxygen
Oⓘ Aurichalcite(Zn,Cu)5(CO3)2(OH)6
Oⓘ AzuriteCu3(CO3)2(OH)2
Oⓘ CalciteCaCO3
Oⓘ ChrysotileMg3(Si2O5)(OH)4
Oⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Oⓘ GoethiteFe3+O(OH)
Oⓘ GypsumCaSO4 · 2H2O
Oⓘ MalachiteCu2(CO3)(OH)2
Oⓘ QuartzSiO2
MgMagnesium
Mgⓘ ChrysotileMg3(Si2O5)(OH)4
AlAluminium
Alⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
SiSilicon
Siⓘ ChrysotileMg3(Si2O5)(OH)4
Siⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Siⓘ QuartzSiO2
SSulfur
Sⓘ BorniteCu5FeS4
Sⓘ ChalcopyriteCuFeS2
Sⓘ ChalcociteCu2S
Sⓘ CovelliteCuS
Sⓘ GypsumCaSO4 · 2H2O
Sⓘ SphaleriteZnS
CaCalcium
Caⓘ CalciteCaCO3
Caⓘ GypsumCaSO4 · 2H2O
FeIron
Feⓘ BorniteCu5FeS4
Feⓘ ChalcopyriteCuFeS2
Feⓘ GoethiteFe3+O(OH)
CuCopper
Cuⓘ Aurichalcite(Zn,Cu)5(CO3)2(OH)6
Cuⓘ AzuriteCu3(CO3)2(OH)2
Cuⓘ BorniteCu5FeS4
Cuⓘ ChalcopyriteCuFeS2
Cuⓘ ChalcociteCu2S
Cuⓘ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Cuⓘ CovelliteCuS
Cuⓘ MalachiteCu2(CO3)(OH)2
ZnZinc
Znⓘ Aurichalcite(Zn,Cu)5(CO3)2(OH)6
Znⓘ SphaleriteZnS

Other Regions, Features and Areas containing this locality

Eurasian PlateTectonic Plate
EuropeContinent

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Savi P. (1850): Rapporto sulle miniere di rame di Castagno e su quella di mercurio di Torri - Tip. M. Cecchi, Firenze.
· Targioni Tozzetti A. (1850): Relazione sopra alcune miniere di mercurio e di rame nei monti presso il Castagno e all'Impruneta in Toscana. - Tip. M. Cecchi, Firenze.
Cortese E. (1927): Giacimenti cupriferi italiani [Toscana 476-483]. - Nuovi Ann. Agric., 7: 471-498.
Betti C., Pagani G. (2000): Minerali del Senese. - Protagon Ed. Toscani, Siena.
[1]Betti, C., Bazzoni, C., Bernocchi, M., Pagani, G., Ciriotti, M.E., Bittarello, E., Batoni, M., Batacchi, C. (2017) Poggio del Cornocchio e dintorni (Firenze - Pisa - Siena): storia, miniere e minerali di una zona poco conosciuta [Poggio del Cornocchio and surroundings (Florence - Pisa - Siena): history, mines and minerals of a little-known area]. Micro, 15 (1). 2-43
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