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St Gotthard Highway tunnel (north section), Göschenen, Reuss Valley, Uri, Switzerland

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Adularia : KAlSi3O8, Chlorite Group

St Gotthard Highway tunnel (north section), Göschenen, Reuss Valley, Uri, Switzerland

Floater specimen of adularia crystals up to 2.5 cm length, partly covered with chlorite.
Specimen size 8.5 x 5.1 x 4.3 cm.
Christian Bracke Collection.
 © Christian BrackePhoto ID: 108315    View Count: 197

Adularia : KAlSi3O8, Chlorite Group

St Gotthard Highway tunnel (north section), Göschenen, Reuss Valley, Uri, Switzerland

Twinned and chlorite covered adularia crystals. Specimen size 4.2 x 3.5 x 3 cm.
Christian Bracke Collection.
 © Christian BrackePhoto ID: 105481    View Count: 193

Adularia : KAlSi3O8, Chlorite Group

St Gotthard Highway tunnel (north section), Göschenen, Reuss Valley, Uri, Switzerland

Chlorite covered adularia crystals up to 1.8 cm length.
Christian Bracke Collection.
 © Christian BrackePhoto ID: 108314    View Count: 183

Albite (Var: Pericline) : Na[AlSi3O8], Dolomite : CaMg(CO3)2, Rutile : TiO2, Pyrite : FeS2

St Gotthard Highway tunnel (north section), Göschenen, Reuss Valley, Uri, Switzerland

Specimen size 8.6 x 6 x 4.3 cm.
Christian Bracke Collection.
 © Christian BrackePhoto ID: 105482    View Count: 192

Anatase : TiO2, Calcite : CaCO3

St Gotthard Highway tunnel (north section), Göschenen, Reuss Valley, Uri, Switzerland

Anatase crystal of 3 mm length, on white calcite.
Christian Bracke Collection.
 © Christian BrackePhoto ID: 108322    View Count: 179

Calcite : CaCO3, Dolomite : CaMg(CO3)2

St Gotthard Highway tunnel (north section), Göschenen, Reuss Valley, Uri, Switzerland

Calcite crystal of 1.2 cm in diameter on dolomite.
Christian Bracke Collection.
 © Christian BrackePhoto ID: 105485    View Count: 164

Calcite : CaCO3

St Gotthard Highway tunnel (north section), Göschenen, Reuss Valley, Uri, Switzerland

Calcite crystals forming a rose-like aggregate.
Specimen size 5.7 x 4.2 x 4 cm.
Christian Bracke Collection.
 © Christian BrackePhoto ID: 105484    View Count: 156

Calcite : CaCO3, Epidote : {Ca2}{Al2Fe3+}[O|OH|SiO4|Si2O7], Dolomite : CaMg(CO3)2

St Gotthard Highway tunnel (north section), Göschenen, Reuss Valley, Uri, Switzerland

White calcite crystal of 7 mm in diameter on epidote covered dolomite crystals.
Christian Bracke Collection.
 © Christian BrackePhoto ID: 108317    View Count: 133

Calcite : CaCO3

St Gotthard Highway tunnel (north section), Göschenen, Reuss Valley, Uri, Switzerland

Calcite crystals up to 3 cm length, specimen size 7.8 x 4.5 x 3.2 cm.
Christian Bracke Collection.
 © Christian BrackePhoto ID: 108318    View Count: 126

Calcite : CaCO3

St Gotthard Highway tunnel (north section), Göschenen, Reuss Valley, Uri, Switzerland

Calcite crystals up to 1.1 cm length.
Christian Bracke Collection.
 © Christian BrackePhoto ID: 108319    View Count: 108
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