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Granaglione, Alto Reno Terme, Reno Valley, Metropolitan City of Bologna, Emilia-Romagna, Italyi
Regional Level Types
GranaglioneMunicipality (Former)
Alto Reno TermeMunicipality
Reno ValleyValley
Metropolitan City of BolognaMetropolitan City

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Locality type:
Municipality (Former) - last checked 2019
Largest Settlements:
Ponte della Venturina1,450 (2016)
Molino del Pallone119 (2016)
Other Languages:
Granajån, Zitè metropolitèna ed Bulåggna (Pruvénzia ed Bulåggna), Emîlia-Rumâgna (Emélia-Rumâgna; Emégglia-Rumâgna), Itâlia
Granaglione, Alto Reno Terme, Città metropolitana di Bologna (Provincia di Bologna), Emilia-Romagna, Italia
Гранальоне , Альто-Рено-Терме, Метрополийный город Болонья (Провинция Болонья), Эмилия-Романья, Италия
Granaglionum, Rheni Superioris Thermae (Rheni Superioris Balnea), Urbs metropolitana Bononiensis (Urbs metropolitana Bononiae), Aemilia et Romania, Italia

On 1 January 2016 the former municipalities of Granaglione and Porretta Terme were merged into the new municipality of Alto Reno Terme.

The presence of quartz crystals in rock clefts of the Arenarie di Suviana (Porretta Sandstone) formation along the slopes of Monte Granaglione, to the north of Granaglione village, is known for a long time (e.g. Gambari, 1868; Bombicci, 1874; Jervis, 1874). Quartz crystals tipically developed skeletal growth forms and show inclusions of light yellow-grey clay. Crystals frequently contain also water and gaseous hydrocarbon inclusions. These crystals have smooth and lustrous, in part curved faces and very often they form aggregates of two or more crystals.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

3 valid minerals.

Detailed Mineral List:

Kaolinite ?
Formula: Al2(Si2O5)(OH)4
Description: Not analysed
Reference: Milani, M., Calzolari, M., Poli, M. (2016): Ritrovamento di opale nella formazione del Macigno. Micro, 1/2016, 21-25.
Formula: SiO2 · nH2O
Reference: Milani, M., Calzolari, M., Poli, M. (2016): Ritrovamento di opale nella formazione del Macigno. Micro, 1/2016, 21-25.
Formula: SiO2
Habit: Skeleton quartz (window quartz) with very good luster, commonly with inclusions of light-brown, fine clay.
Colour: colorless
Reference: Natural History Museum Vienna Collection

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Opal4.DA.10SiO2 · nH2O
Group 9 - Silicates
Kaolinite ?9.ED.05Al2(Si2O5)(OH)4

List of minerals arranged by Dana 8th Edition classification

Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Si Tetrahedral Frameworks - SiO2 with H2O and organics
Opal75.2.1.1SiO2 · nH2O
Unclassified Minerals, Mixtures, etc.
Kaolinite ?-Al2(Si2O5)(OH)4

List of minerals for each chemical element

H OpalSiO2 · nH2O
H KaoliniteAl2(Si2O5)(OH)4
O QuartzSiO2
O OpalSiO2 · nH2O
O KaoliniteAl2(Si2O5)(OH)4
Al KaoliniteAl2(Si2O5)(OH)4
Si QuartzSiO2
Si OpalSiO2 · nH2O
Si KaoliniteAl2(Si2O5)(OH)4


Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Gambari, L. (1868) Descrizione dei quarzi di Porretta. Atti della Società dei naturalisti e matematici di Modena, 3, 1-19.
Bombicci, L. (1874) Descrizione della mineralogia generale della provincia di Bologna. Seconda parte. Memorie della R. Accademia delle Scienze dell'Istituto di Bologna, serie 3, 5, 105-222.
Jervis, G. (1874) I tesori sotterranei dell'Italia. Vol. 2: Regione dell’Appennino e vulcani attivi e spenti dipendentivi. Ermanno Loescher, Torino, XVIII+624 pp.

Localities in this Region

  • Emilia-Romagna

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