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Rio Graia, Trontano, Vigezzo Valley, Ossola Valley, Verbano-Cusio-Ossola Province, Piedmont, Italyi
Regional Level Types
Rio Graia- not defined -
Trontano- not defined -
Vigezzo ValleyValley
Ossola ValleyValley
Verbano-Cusio-Ossola ProvinceProvince
PiedmontRegion
ItalyCountry

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Name(s) in local language(s):Rio Graia, Trontano, Val Vigezzo, Val d'Ossola, Verbano-Cusio-Ossola, Piemonte, Italia
Latitude & Longitude (WGS84): 46° 7' 1'' North , 8° 20' 57'' East
Latitude & Longitude (decimal): 46.11722,8.34944
GeoHash:G#: u0jymgruk
Köppen climate type:Dfc : Subarctic climate
Nearest Settlements:
PlacePopulationDistance
Trontano465 (2014)1.4km
Masera1,349 (2014)3.0km
Croppo727 (2014)3.6km
Cosa152 (2014)3.7km
Coimo262 (2014)4.1km


Rio Graia pegmatite, located at 695 m a.s.l., is famous for its large beryl xls, up to 10 cm long, and also for some rare species such as ferrotapiolite.

Regions containing this locality

Eurasian PlateTectonic Plate
EuropeContinent
The Alps, EuropeMountain Range

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


24 valid minerals.

Detailed Mineral List:

'Allanite Group'
Formula: {A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
Arsenopyrite
Formula: FeAsS
Autunite
Formula: Ca(UO2)2(PO4)2 · 11H2O
Bavenite
Formula: Ca4Be2Al2Si9O26(OH)2
Beryl
Formula: Be3Al2(Si6O18)
Clinozoisite
Formula: {Ca2}{Al3}(Si2O7)(SiO4)O(OH)
'Columbite-(Fe)-Columbite-(Mn) Series'
Euxenite-(Y)
Formula: (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Fergusonite-(Y)
Formula: YNbO4
Fersmite
Formula: (Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6
Kaolinite
Formula: Al2(Si2O5)(OH)4
'K Feldspar'
'K Feldspar var: Adularia'
Formula: KAlSi3O8
Laumontite
Formula: CaAl2Si4O12 · 4H2O
Microcline
Formula: K(AlSi3O8)
'Microlite Group'
Formula: A2-mTa2X6-wZ-n
'Microlite Group var: Uranmicrolite (of Hogarth 1977)'
Monazite-(Ce)
Formula: Ce(PO4)
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Opal
Formula: SiO2 · nH2O
Orthoclase
Formula: K(AlSi3O8)
Phosphuranylite
Formula: (H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
'Pyrochlore Group'
Formula: A2Nb2(O,OH)6Z
Quartz
Formula: SiO2
Samarskite-(Y)
Formula: (Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
'Tantalite'
Formula: (Mn,Fe)(Ta,Nb)2O6
Tanteuxenite-(Y) ?
Formula: Y(Ta,Nb,Ti)2(O,OH)6
'Tapiolite'
Formula: (Fe,Mn)(Ta,Nb)2O6
Tapiolite-(Fe)
Formula: (Fe,Mn)(Ta,Nb)2O6
'Tourmaline'
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Uraninite
Formula: UO2
Uranophane
Formula: Ca(UO2)2(SiO3OH)2 · 5H2O
Xenotime-(Y)
Formula: Y(PO4)
Zircon
Formula: Zr(SiO4)

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Arsenopyrite2.EB.20FeAsS
Group 4 - Oxides and Hydroxides
Euxenite-(Y)4.DG.05(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Fersmite4.DG.05(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6
'Microlite Group'4.00.A2-mTa2X6-wZ-n
'var: Uranmicrolite (of Hogarth 1977)'4.00.A2-mTa2X6-wZ-n
Opal4.DA.10SiO2 · nH2O
'Pyrochlore Group'4.00.A2Nb2(O,OH)6Z
Quartz4.DA.05SiO2
Samarskite-(Y)4.DB.25(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
Tanteuxenite-(Y) ?4.DG.05Y(Ta,Nb,Ti)2(O,OH)6
Tapiolite-(Fe)4.DB.10(Fe,Mn)(Ta,Nb)2O6
Uraninite4.DL.05UO2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Fergusonite-(Y)7.GA.05YNbO4
Group 8 - Phosphates, Arsenates and Vanadates
Autunite8.EB.05Ca(UO2)2(PO4)2 · 11H2O
Monazite-(Ce)8.AD.50Ce(PO4)
Phosphuranylite8.EC.10(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
Xenotime-(Y)8.AD.35Y(PO4)
Group 9 - Silicates
Bavenite9.DF.25Ca4Be2Al2Si9O26(OH)2
Beryl9.CJ.05Be3Al2(Si6O18)
Clinozoisite9.BG.05a{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Kaolinite9.ED.05Al2(Si2O5)(OH)4
Laumontite9.GB.10CaAl2Si4O12 · 4H2O
Microcline9.FA.30K(AlSi3O8)
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Orthoclase9.FA.30K(AlSi3O8)
Uranophane9.AK.15Ca(UO2)2(SiO3OH)2 · 5H2O
Zircon9.AD.30Zr(SiO4)
Unclassified Minerals, Rocks, etc.
'Allanite Group'-{A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
'Columbite-(Fe)-Columbite-(Mn) Series'-
'K Feldspar'-
'var: Adularia'-KAlSi3O8
'Tantalite'-(Mn,Fe)(Ta,Nb)2O6
'Tapiolite'-(Fe,Mn)(Ta,Nb)2O6
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:2
Arsenopyrite2.12.4.1FeAsS
Group 5 - OXIDES CONTAINING URANIUM OR THORIUM
AXO2·xH2O
Uraninite5.1.1.1UO2
Group 8 - MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
ABO4
Fergusonite-(Y)8.1.1.1YNbO4
Samarskite-(Y)8.1.11.1(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
A2B2O6(O,OH,F)
'Microlite Group'8.2.2.1A2-mTa2X6-wZ-n
'Pyrochlore Group'8.2.1.1A2Nb2(O,OH)6Z
AB2O6
Euxenite-(Y)8.3.8.2(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Fersmite8.3.3.1(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6
Tanteuxenite-(Y) ?8.3.8.3Y(Ta,Nb,Ti)2(O,OH)6
Tapiolite-(Fe)8.3.1.1(Fe,Mn)(Ta,Nb)2O6
Group 38 - ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
AXO4
Monazite-(Ce)38.4.3.1Ce(PO4)
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
AB2(XO4)2·xH2O, containing (UO2)2+
Autunite40.2a.1.1Ca(UO2)2(PO4)2 · 11H2O
Group 42 - HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)5(XO4)2Zq·xH2O
Phosphuranylite42.4.8.1(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in >[6] coordination
Zircon51.5.2.1Zr(SiO4)
Group 53 - NESOSILICATES Insular SiO4 Groups and Other Anions or Complex Cations
Insular SiO4 Groups and Other Anions of Complex Cations with (UO2)
Uranophane53.3.1.2Ca(UO2)2(SiO3OH)2 · 5H2O
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Clinozoisite58.2.1a.4{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Beryl61.1.1.1Be3Al2(Si6O18)
Group 70 - INOSILICATES Column or Tube Structures
Column or Tube Structures with chains linked by Be
Bavenite70.5.3.1Ca4Be2Al2Si9O26(OH)2
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Si Tetrahedral Frameworks - SiO2 with H2O and organics
Opal75.2.1.1SiO2 · nH2O
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Microcline76.1.1.5K(AlSi3O8)
Orthoclase76.1.1.1K(AlSi3O8)
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Laumontite77.1.1.4CaAl2Si4O12 · 4H2O
Unclassified Minerals, Mixtures, etc.
'Allanite Group'-{A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
'Columbite-(Fe)-Columbite-(Mn) Series'-
'K Feldspar'-
'var: Adularia'-KAlSi3O8
Kaolinite-Al2(Si2O5)(OH)4
'Microlite Group
var: Uranmicrolite (of Hogarth 1977)'
-A2-mTa2X6-wZ-n
'Tantalite'-(Mn,Fe)(Ta,Nb)2O6
'Tapiolite'-(Fe,Mn)(Ta,Nb)2O6
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z
Xenotime-(Y)-Y(PO4)

List of minerals for each chemical element

HHydrogen
H Pyrochlore GroupA2Nb2(O,OH)6Z
H BaveniteCa4Be2Al2Si9O26(OH)2
H LaumontiteCaAl2Si4O12 · 4H2O
H OpalSiO2 · nH2O
H Fersmite(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6
H Allanite Group{A12+REE3+}{M23+M32+}(Si2O7)(SiO4)O(OH)
H AutuniteCa(UO2)2(PO4)2 · 11H2O
H KaoliniteAl2(Si2O5)(OH)4
H Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
H Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
H MuscoviteKAl2(AlSi3O10)(OH)2
H UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
H Tanteuxenite-(Y)Y(Ta,Nb,Ti)2(O,OH)6
BeBeryllium
Be BaveniteCa4Be2Al2Si9O26(OH)2
Be BerylBe3Al2(Si6O18)
BBoron
B TourmalineA(D3)G6(T6O18)(BO3)3X3Z
OOxygen
O ZirconZr(SiO4)
O Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
O Pyrochlore GroupA2Nb2(O,OH)6Z
O UraniniteUO2
O Tapiolite(Fe,Mn)(Ta,Nb)2O6
O K Feldspar (var: Adularia)KAlSi3O8
O Xenotime-(Y)Y(PO4)
O Tantalite(Mn,Fe)(Ta,Nb)2O6
O BaveniteCa4Be2Al2Si9O26(OH)2
O LaumontiteCaAl2Si4O12 · 4H2O
O OpalSiO2 · nH2O
O TourmalineA(D3)G6(T6O18)(BO3)3X3Z
O BerylBe3Al2(Si6O18)
O Tapiolite-(Fe)(Fe,Mn)(Ta,Nb)2O6
O Fersmite(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6
O Allanite Group{A12+REE3+}{M23+M32+}(Si2O7)(SiO4)O(OH)
O AutuniteCa(UO2)2(PO4)2 · 11H2O
O KaoliniteAl2(Si2O5)(OH)4
O Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
O Fergusonite-(Y)YNbO4
O Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
O MicroclineK(AlSi3O8)
O Monazite-(Ce)Ce(PO4)
O MuscoviteKAl2(AlSi3O10)(OH)2
O OrthoclaseK(AlSi3O8)
O QuartzSiO2
O Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
O UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
O Tanteuxenite-(Y)Y(Ta,Nb,Ti)2(O,OH)6
FFluorine
F Fersmite(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6
NaSodium
Na Fersmite(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6
AlAluminium
Al K Feldspar (var: Adularia)KAlSi3O8
Al BaveniteCa4Be2Al2Si9O26(OH)2
Al LaumontiteCaAl2Si4O12 · 4H2O
Al BerylBe3Al2(Si6O18)
Al KaoliniteAl2(Si2O5)(OH)4
Al Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Al MicroclineK(AlSi3O8)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al OrthoclaseK(AlSi3O8)
SiSilicon
Si ZirconZr(SiO4)
Si K Feldspar (var: Adularia)KAlSi3O8
Si BaveniteCa4Be2Al2Si9O26(OH)2
Si LaumontiteCaAl2Si4O12 · 4H2O
Si OpalSiO2 · nH2O
Si BerylBe3Al2(Si6O18)
Si Allanite Group{A12+REE3+}{M23+M32+}(Si2O7)(SiO4)O(OH)
Si KaoliniteAl2(Si2O5)(OH)4
Si Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Si MicroclineK(AlSi3O8)
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si OrthoclaseK(AlSi3O8)
Si QuartzSiO2
Si UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
PPhosphorus
P Xenotime-(Y)Y(PO4)
P AutuniteCa(UO2)2(PO4)2 · 11H2O
P Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
P Monazite-(Ce)Ce(PO4)
SSulfur
S ArsenopyriteFeAsS
KPotassium
K K Feldspar (var: Adularia)KAlSi3O8
K Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
K MicroclineK(AlSi3O8)
K MuscoviteKAl2(AlSi3O10)(OH)2
K OrthoclaseK(AlSi3O8)
CaCalcium
Ca Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Ca BaveniteCa4Be2Al2Si9O26(OH)2
Ca LaumontiteCaAl2Si4O12 · 4H2O
Ca Fersmite(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6
Ca AutuniteCa(UO2)2(PO4)2 · 11H2O
Ca Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Ca Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
Ca Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
Ca UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
TiTitanium
Ti Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Ti Fersmite(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6
Ti Tanteuxenite-(Y)Y(Ta,Nb,Ti)2(O,OH)6
MnManganese
Mn Tapiolite(Fe,Mn)(Ta,Nb)2O6
Mn Tantalite(Mn,Fe)(Ta,Nb)2O6
FeIron
Fe Tapiolite(Fe,Mn)(Ta,Nb)2O6
Fe Tantalite(Mn,Fe)(Ta,Nb)2O6
Fe Tapiolite-(Fe)(Fe,Mn)(Ta,Nb)2O6
Fe ArsenopyriteFeAsS
Fe Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
AsArsenic
As ArsenopyriteFeAsS
YYttrium
Y Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Y Xenotime-(Y)Y(PO4)
Y Fergusonite-(Y)YNbO4
Y Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
Y Tanteuxenite-(Y)Y(Ta,Nb,Ti)2(O,OH)6
ZrZirconium
Zr ZirconZr(SiO4)
NbNiobium
Nb Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Nb Pyrochlore GroupA2Nb2(O,OH)6Z
Nb Tapiolite(Fe,Mn)(Ta,Nb)2O6
Nb Tantalite(Mn,Fe)(Ta,Nb)2O6
Nb Fersmite(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6
Nb Fergusonite-(Y)YNbO4
Nb Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
Nb Tanteuxenite-(Y)Y(Ta,Nb,Ti)2(O,OH)6
CeCerium
Ce Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Ce Fersmite(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6
Ce Monazite-(Ce)Ce(PO4)
TaTantalum
Ta Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Ta Tapiolite(Fe,Mn)(Ta,Nb)2O6
Ta Tantalite(Mn,Fe)(Ta,Nb)2O6
Ta Tapiolite-(Fe)(Fe,Mn)(Ta,Nb)2O6
Ta Fersmite(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6
Ta Microlite GroupA2-mTa2X6-wZ-n
Ta Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
Ta Tanteuxenite-(Y)Y(Ta,Nb,Ti)2(O,OH)6
ThThorium
Th Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Th Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
UUranium
U Euxenite-(Y)(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
U UraniniteUO2
U AutuniteCa(UO2)2(PO4)2 · 11H2O
U Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2O
U Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
U UranophaneCa(UO2)2(SiO3OH)2 · 5H2O

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Unknown
Ma



ID: 2367125
Metamorphe Gesteine, meist Metasedimente

Age: Anthropocene ( Ma)

Lithology: Gneiss and mica schist

Reference: Geological Institute. Geological Map of Switzerland 1:500,000. isbn: 3906723399. University of Bern. [49]

Paleozoic - Proterozoic
251.902 - 2500 Ma



ID: 3151199
basement

Age: to Triassic (251.902 - 2500 Ma)

Description: medium grade metamorphic

Lithology: Gneiss

Reference: Asch, K. The 1:5M International Geological Map of Europe and Adjacent Areas: Development and Implementation of a GIS-enabled Concept. Geologisches Jahrbuch, SA 3. [147]

Cambrian - Proterozoic
485.4 - 2500 Ma



ID: 3189284
Precambrian-Phanerozoic crystalline metamorphic rocks

Age: to Cambrian (485.4 - 2500 Ma)

Comments: Alps

Lithology: Crystalline metamorphic rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
- Mattioli V. (1974): Bavenite delle pegmatiti ossolane. Notizie Gr. Mineral. Lombardo, 5, 2 (Giugno 1974), 38-41.
- Mattioli V. (1976): Località mineralogiche consigliate: Rio Graja, Trontano, Valle Vigezzo. Notizie Gr. Mineral. Lombardo, 7, 2 (Giugno 1976), 40-42.
- Boscardin M., Mattioli V., Pierini G. (1982): Mikrolith und Columbite. Lapis, 7, 3, 17-19 [ with analysis of 2 columbites from Rio Graia]
Callegari, A., Vanini, F. (2002): La fersmite della pegmatite di Rio Graia. Rivista Mineralogica Italiana, 4/2002, 212-215.
Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" di Alba, Ed., Alba, 607 pp.
Guastoni, A. (2012): LCT (lithium, cesium, tantalum) and NYF (niobium, yttrium, fluorine) pegmatites in the Central Alps. Proxies of exhumation history of the Alpine nappe stack in the Lepontine Dome. Ph.D. Thesis. University of Padova, Dept. of Geosciences, 159 pp.
Boscardin, M., Mattioli, V., Rocchetti, I. (2013): Minerali della Valle Vigezzo. Litotipografia Alcione, Lavis (Trento), 229 pp.


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