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Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland i
Regional Level Types
Val Giuv Valley
Tujetsch Municipality
Surselva Region Region
Grisons Canton
Switzerland Country

Regional Level Types
Val Giuv	Valley
Tujetsch	Municipality
Surselva Region	Region
Grisons	Canton
Switzerland	Country

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Upper Val Giuv

Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

Giuv Valley

Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

glacier

Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

Upper Val Giuv

Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

Giuv Valley

Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

glacier

Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

Upper Val Giuv

Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

Giuv Valley

Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

Latitude & Longitude (WGS84):

46° 41' 32'' North , 8° 42' 5'' East

Latitude & Longitude (decimal):

G#: u0q1wh074

Type:

Köppen climate type:

Mindat Locality ID:

7758

Long-form identifier:

mindat:1:2:7758:6

GUID (UUID V4):

d0ed6137-fed4-417e-9259-192fa7969d1b

Other/historical names associated with this locality:

Val Giuf; Giuv Valley

Name(s) in local language(s):

Val Giuv, Tujetsch (Tavetsch), Vorderrheintal, Graubünden (Grisons; Grischun), Schweiz (Suisse; Svizzera)

In older literature also: Val Giuf.

Val Giuv is a glacial trough valley in the south-eastern Aar massif.

Geology
The lower, southern part of the valley cuts through three structural units and the respective rocks: Tavetscher Zwischenmassiv at the southern end, the so-called Altkristallin rocks and the so-called Southern Aare granite to the north. The boundaries between these rocks are blurred because the rocks have been subject to great tectonic stress and mostly turned to schists with vertical foliation and joints.
At the northern end of the valley, in upper Val Giuv, a weakly metamorphosed igneous rock called "Giuvsyenit" (a quartz-monzonite / quartz-syenite) is exposed. The elongated body of the Giuv "syenite" extends from the Schijenstock in the Riental, the Fellital, Val Val, Val Giuv, Etzlital, to the Stremhörner in Val Strem.
The Giuv "syenite" contains about 40% large white elongated K-feldspar crystals in subparallel orientation, greenish actinolite, and dark biotite, giving it a characteristic "stripy" look. The rock has an unusually high content of uranium and thorium (Labhart, 1977).
The rock is cut by numerous aplitic dikes that may be several meters wide and extend over hundreds of meters. There are also numerous zones of schists.

Mineralizations
Val Giuv is very rich in Alpine-type fissures, in particular, the Giuv syenite. Pockets are unevenly distributed and are concentrated along the southern boundary of the Giuv syenite rock body. Alpine-type fissures also occur in the aplite dikes but differ slightly in their paragenesis (beryllium minerals like milarite only occur in and around aplites).

Collecting
To collect in Val Giuv one needs to purchase a collecting permit from the Tujetsch community (a so-called "Strahlerpatent"). Val Giuv has been searched for minerals for about 200 years. Good finds are still being made, but opening an Alpine-type fissure requires substantial efforts and is usually done with drills and explosives. Everything "obvious" has been exploited a long time ago, and very little new gets exposed by erosion, so one should lower one's expectations for a day trip.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

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

25 valid minerals. 1 (TL) - type locality of valid minerals. 1 erroneous literature entry.

Detailed Mineral List:

ⓘ Actinolite

Formula: ◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂

References:

Koenigsberger, J.G. (1940) Die zentralalpinen Minerallagerstätten, Wepf und Co. Verlag, Basel.

ⓘ Albite

Formula: Na(AlSi₃O₈)

Locality: Piz Giuv south slope, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

ⓘ 'Amphibole Supergroup'

Formula: AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂

Localities:

Piz Giuv south slope, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland
Secunda Muotta, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland
Kalkspat-Lücke, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland
Tiarza Muotta, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

References:

Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 362.

ⓘ 'Amphibole Supergroup var. Byssolite'

Formula: AX₂Z₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂

Localities:

References:

Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 362.

ⓘ 'Apatite'

Formula: Ca₅(PO₄)₃(Cl/F/OH)

Localities:

Piz Giuv south slope, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland
Secunda Muotta, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

References:

Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 362.

ⓘ 'Apophyllite Group'

Formula: AB₄[Si₈O₂₂]X · 8H₂O

References:

Koenigsberger, J.G. (1940) Die zentralalpinen Minerallagerstätten, Wepf und Co. Verlag, Basel.

ⓘ Baryte

Formula: BaSO₄

References:

Jahn, S. (2004): Klassische Weltfundstelle: Val Giuv. Mineralien Welt 15 (1), 34-61

ⓘ Calcite

Formula: CaCO₃

Localities:

Giuvstöckli, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland
Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland
Secunda Muotta, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland
Kalkspat-Lücke, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

References:

Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): Mineralienlexikon der Schweiz. Wepf (Basel), p. 132.

ⓘ 'Chabazite'

Localities:

Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland
Emprema Muotta, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland
Kalkspat-Lücke, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

References:

Jahn, S. (2004): Klassische Weltfundstelle: Val Giuv. Mineralien Welt 15 (1), 34-61

ⓘ Chalcopyrite

Formula: CuFeS₂

References:

Jahn, S. (2004): Klassische Weltfundstelle: Val Giuv. Mineralien Welt 15 (1), 34-61

ⓘ Clinochlore

Formula: Mg₅Al(AlSi₃O₁₀)(OH)₈

Localities:

Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland
Emprema Muotta, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland
Secunda Muotta, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland
Tiarza Muotta, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland
Rotwichel, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

Description: Very common as pocket clay and superficial inclusion in adularia and quartz, also in titanite.

References:

Jahn, S. (2004): Klassische Weltfundstelle: Val Giuv. Mineralien Welt 15 (1), 34-61

ⓘ Datolite

Formula: CaB(SiO₄)(OH)

Locality: Giuvstöckli, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

ⓘ Epidote

Formula: (CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)

Localities:

Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland
Tiarza Muotta, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

References:

Koenigsberger, J.G. (1940) Die zentralalpinen Minerallagerstätten, Wepf und Co. Verlag, Basel.

ⓘ Fluorapatite

Formula: Ca₅(PO₄)₃F

Description: Small, usually colorless and clear, well-developed crystals of good luster.

References:

Jahn, S. (2004) Klassische Weltfundstelle: Val Giuv. Mineralien Welt, 15(1): 34-61

ⓘ Fluorite

Formula: CaF₂

Localities:

Giuv glacier, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland
Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

References:

Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 168.

ⓘ Galena

Formula: PbS

References:

Jahn, S. (2004): Klassische Weltfundstelle: Val Giuv. Mineralien Welt 15 (1), 34-61

ⓘ Hematite

Formula: Fe₂O₃

References:

Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 208.

ⓘ Heulandite-Ca

Formula: (Ca,Na)₅(Si₂₇Al₉)O₇₂ · 26H₂O

References:

Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 214.

ⓘ 'K Feldspar'

Localities:

Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland
Emprema Muotta, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland
Secunda Muotta, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland
Kalkspat-Lücke, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland
Tiarza Muotta, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

References:

Jahn, S. (2004): Klassische Weltfundstelle: Val Giuv. Mineralien Welt 15 (1), 34-61

ⓘ 'K Feldspar var. Adularia'

Formula: KAlSi₃O₈

Localities:

Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland
Emprema Muotta, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland
Secunda Muotta, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland
Kalkspat-Lücke, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland
Tiarza Muotta, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

References:

Jahn, S. (2004): Klassische Weltfundstelle: Val Giuv. Mineralien Welt 15 (1), 34-61

ⓘ Laumontite

Formula: CaAl₂Si₄O₁₂ · 4H₂O

References:

Jahn, S. (2004): Klassische Weltfundstelle: Val Giuv. Mineralien Welt 15 (1), 34-61

ⓘ Malachite

Formula: Cu₂(CO₃)(OH)₂

References:

"Amir Akhavan" collection

✪ Milarite (TL)

Formula: K(◻H₂O)Ca₂(Be₂Al)[Si₁₂O₃₀]

Type Locality:

Habit: Hexagonal crystals, smaller crystals clear, larger crystals translucent. Largest Alpine specimen, 4.5cm has been found here in 2000.

Colour: Colorless, green, yellow

Description: Like other Be-bearing minerals at this locality typically associated with aplitic dikes.

References:

Neues Jahrb.Min.(1870) 80

ⓘ Muscovite

Formula: KAl₂(AlSi₃O₁₀)(OH)₂

Localities:

Rotwichel, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland
Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

Description: Small, shiny muscovite books intergrown with massive quartz in mylonitic shists.

References:

"Amir Akhavan" collection

ⓘ Muscovite var. Illite

Formula: K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂

References:

Jahn, S. (2004): Klassische Weltfundstelle: Val Giuv. Mineralien Welt 15 (1), 34-61

ⓘ Phenakite

Formula: Be₂SiO₄

References:

Jahn, S., Bode, R. (2005) Das Tujetsch - Mineralien und Fundstellen einer klassischen Strahler-Region in der Schweiz (II). Mineralien-Welt: 16(1): 17-33.

ⓘ Prehnite

Formula: Ca₂Al₂Si₃O₁₀(OH)₂

References:

Koenigsberger, J.G. (1940) Die zentralalpinen Minerallagerstätten, Wepf und Co. Verlag, Basel.

ⓘ Pyrite

Formula: FeS₂

Localities:

Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland
Tiarza Muotta, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland
Secunda Muotta, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland
Kalkspat-Lücke, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

References:

Jahn, S. (2004): Klassische Weltfundstelle: Val Giuv. Mineralien Welt 15 (1), 34-61

ⓘ Quartz

Formula: SiO₂

Localities: Reported from at least 7 localities in this region.

Habit: Macromosaic quartz of normal habit, large trapezohedral faces (x-faces) are not uncommon, these are often roughened. Famous gwindel locality.

Colour: cognac-colored to dark smoky quartz, sometimes lighter colors in pockets of aplitic dikes.

References:

Jahn, S. (2004) Klassische Weltfundstelle: Val Giuv. Mineralien Welt, 15 (1): 34-61

ⓘ Quartz var. Amethyst

Formula: SiO₂

Locality: Emprema Muotta, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

Colour: pale purple

Description: Scepter quartz with pale purple tips. Found by Dosi Venzin in 1989.

ⓘ Quartz var. Quartz Gwindel

Formula: SiO₂

References:

Koenigsberger, J.G. (1940) Die zentralalpinen Minerallagerstätten, Wepf und Co. Verlag, Basel.

ⓘ Quartz var. Rock Crystal

Formula: SiO₂

Locality: Kalkspat-Lücke, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

Habit: Normal habit, with trapezohedral faces.

Description: Limonite-encrusted, clear, rock crystals have been found by Dosi Venzin in 2006, together with limonitized pyrite, adularia and chabazite.

ⓘ Quartz var. Smoky Quartz

Formula: SiO₂

Localities: Reported from at least 7 localities in this region.

References:

Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 362.

ⓘ Rutile

Formula: TiO₂

References:

Alberto Vaghi collection

ⓘ Scheelite

Formula: Ca(WO₄)

Localities:

Piz Giuv south slope, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland
Giuvstöckli, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland
Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

References:

Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 362.

ⓘ Scolecite

Formula: CaAl₂Si₃O₁₀ · 3H₂O

References:

Jahn, S. (2004): Klassische Weltfundstelle: Val Giuv. Mineralien Welt 15 (1), 34-61

ⓘ ~~Seidozerite~~

Formula: Na₄MnZr₂Ti(Si₂O₇)₂O₂F₂

References:

(n.d.)

ⓘ 'Stilbite Subgroup'

Formula: M_6-7[Al_8-9Si_27-28O₇₂] · nH₂O

Localities:

References:

Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 388.

ⓘ Titanite

Formula: CaTi(SiO₄)O

Localities:

Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland
Secunda Muotta, Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

References:

Koenigsberger, J.G. (1940) Die zentralalpinen Minerallagerstätten, Wepf und Co. Verlag, Basel.

Gallery:

Ca₅(PO₄)₃(Cl/F/OH)ⓘ 'Apatite'

Apatite, etc.

Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

Apatite, etc.

Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

Apatite, etc.

Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

FeS₂ⓘ Pyrite

Pyrite

Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

Pyrite

Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

Pyrite

Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

CaAl₂Si₃O₁₀ · 3H₂Oⓘ Scolecite

Scolecite, etc.

Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

Scolecite, etc.

Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

Scolecite, etc.

Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘ	Chalcopyrite	2.CB.10a	CuFeS₂
ⓘ	Galena	2.CD.10	PbS
ⓘ	Pyrite	2.EB.05a	FeS₂
Group 3 - Halides
ⓘ	Fluorite	3.AB.25	CaF₂
Group 4 - Oxides and Hydroxides
ⓘ	Hematite	4.CB.05	Fe₂O₃
ⓘ	Quartz var. Quartz Gwindel	4.DA.05	SiO₂
ⓘ	var. Rock Crystal	4.DA.05	SiO₂
ⓘ	var. Amethyst	4.DA.05	SiO₂
ⓘ	var. Smoky Quartz	4.DA.05	SiO₂
ⓘ		4.DA.05	SiO₂
ⓘ	Rutile	4.DB.05	TiO₂
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
ⓘ	Malachite	5.BA.10	Cu₂(CO₃)(OH)₂
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘ	Baryte	7.AD.35	BaSO₄
ⓘ	Scheelite	7.GA.05	Ca(WO₄)
Group 8 - Phosphates, Arsenates and Vanadates
ⓘ	Fluorapatite	8.BN.05	Ca₅(PO₄)₃F
Group 9 - Silicates
ⓘ	Phenakite	9.AA.05	Be₂SiO₄
ⓘ	Titanite	9.AG.15	CaTi(SiO₄)O
ⓘ	Datolite	9.AJ.20	CaB(SiO₄)(OH)
ⓘ	Seidozerite ?	9.BE.25	Na₄MnZr₂Ti(Si₂O₇)₂O₂F₂
ⓘ	Epidote	9.BG.05a	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
ⓘ	Milarite (TL)	9.CM.05	K(◻H₂O)Ca₂(Be₂Al)[Si₁₂O₃₀]
ⓘ	Actinolite	9.DE.10	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
ⓘ	Prehnite	9.DP.20	Ca₂Al₂Si₃O₁₀(OH)₂
ⓘ	Muscovite	9.EC.15	KAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	var. Illite	9.EC.15	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
ⓘ	Clinochlore	9.EC.55	Mg₅Al(AlSi₃O₁₀)(OH)₈
ⓘ	Albite	9.FA.35	Na(AlSi₃O₈)
ⓘ	Scolecite	9.GA.05	CaAl₂Si₃O₁₀ · 3H₂O
ⓘ	Laumontite	9.GB.10	CaAl₂Si₄O₁₂ · 4H₂O
ⓘ	Heulandite-Ca	9.GE.05	(Ca,Na)₅(Si₂₇Al₉)O₇₂ · 26H₂O
Unclassified
ⓘ	'Chabazite'	-
ⓘ	'K Feldspar var. Adularia'	-	KAlSi₃O₈
ⓘ	'Amphibole Supergroup'	-	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
ⓘ	'Stilbite Subgroup'	-	M_6-7[Al_8-9Si_27-28O₇₂] · nH₂O
ⓘ	'K Feldspar'	-
ⓘ	'Amphibole Supergroup var. Byssolite'	-	AX₂Z₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
ⓘ	'Apatite'	-	Ca₅(PO₄)₃(Cl/F/OH)
ⓘ	'Apophyllite Group'	-	AB₄[Si₈O₂₂]X · 8H₂O

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
H	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
H	ⓘ Apophyllite Group	AB₄[Si₈O₂₂]X · 8H₂O
H	ⓘ Clinochlore	Mg₅Al(AlSi₃O₁₀)(OH)₈
H	ⓘ Datolite	CaB(SiO₄)(OH)
H	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
H	ⓘ Muscovite var. Illite	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
H	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
H	ⓘ Malachite	Cu₂(CO₃)(OH)₂
H	ⓘ Milarite	K(◻H₂O)Ca₂(Be₂Al)[Si₁₂O₃₀]
H	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
H	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
H	ⓘ Scolecite	CaAl₂Si₃O₁₀ · 3H₂O
H	ⓘ Stilbite Subgroup	M_6-7[Al_8-9Si_27-28O₇₂] · nH₂O
H	ⓘ Heulandite-Ca	(Ca,Na)₅(Si₂₇Al₉)O₇₂ · 26H₂O
H	ⓘ Amphibole Supergroup var. Byssolite	AX₂Z₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
H	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
Be	Beryllium
Be	ⓘ Milarite	K(◻H₂O)Ca₂(Be₂Al)[Si₁₂O₃₀]
Be	ⓘ Phenakite	Be₂SiO₄
B	Boron
B	ⓘ Datolite	CaB(SiO₄)(OH)
C	Carbon
C	ⓘ Calcite	CaCO₃
C	ⓘ Malachite	Cu₂(CO₃)(OH)₂
O	Oxygen
O	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
O	ⓘ K Feldspar var. Adularia	KAlSi₃O₈
O	ⓘ Albite	Na(AlSi₃O₈)
O	ⓘ Quartz var. Amethyst	SiO₂
O	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
O	ⓘ Apophyllite Group	AB₄[Si₈O₂₂]X · 8H₂O
O	ⓘ Baryte	BaSO₄
O	ⓘ Calcite	CaCO₃
O	ⓘ Clinochlore	Mg₅Al(AlSi₃O₁₀)(OH)₈
O	ⓘ Datolite	CaB(SiO₄)(OH)
O	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
O	ⓘ Fluorapatite	Ca₅(PO₄)₃F
O	ⓘ Hematite	Fe₂O₃
O	ⓘ Muscovite var. Illite	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
O	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
O	ⓘ Malachite	Cu₂(CO₃)(OH)₂
O	ⓘ Milarite	K(◻H₂O)Ca₂(Be₂Al)[Si₁₂O₃₀]
O	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
O	ⓘ Phenakite	Be₂SiO₄
O	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
O	ⓘ Quartz	SiO₂
O	ⓘ Rutile	TiO₂
O	ⓘ Scheelite	Ca(WO₄)
O	ⓘ Scolecite	CaAl₂Si₃O₁₀ · 3H₂O
O	ⓘ Seidozerite	Na₄MnZr₂Ti(Si₂O₇)₂O₂F₂
O	ⓘ Quartz var. Smoky Quartz	SiO₂
O	ⓘ Stilbite Subgroup	M_6-7[Al_8-9Si_27-28O₇₂] · nH₂O
O	ⓘ Titanite	CaTi(SiO₄)O
O	ⓘ Quartz var. Rock Crystal	SiO₂
O	ⓘ Heulandite-Ca	(Ca,Na)₅(Si₂₇Al₉)O₇₂ · 26H₂O
O	ⓘ Amphibole Supergroup var. Byssolite	AX₂Z₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
O	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
O	ⓘ Quartz var. Quartz Gwindel	SiO₂
F	Fluorine
F	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
F	ⓘ Fluorapatite	Ca₅(PO₄)₃F
F	ⓘ Fluorite	CaF₂
F	ⓘ Seidozerite	Na₄MnZr₂Ti(Si₂O₇)₂O₂F₂
F	ⓘ Amphibole Supergroup var. Byssolite	AX₂Z₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
F	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
Na	Sodium
Na	ⓘ Albite	Na(AlSi₃O₈)
Na	ⓘ Seidozerite	Na₄MnZr₂Ti(Si₂O₇)₂O₂F₂
Na	ⓘ Heulandite-Ca	(Ca,Na)₅(Si₂₇Al₉)O₇₂ · 26H₂O
Mg	Magnesium
Mg	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
Mg	ⓘ Clinochlore	Mg₅Al(AlSi₃O₁₀)(OH)₈
Al	Aluminium
Al	ⓘ K Feldspar var. Adularia	KAlSi₃O₈
Al	ⓘ Albite	Na(AlSi₃O₈)
Al	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Al	ⓘ Clinochlore	Mg₅Al(AlSi₃O₁₀)(OH)₈
Al	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Al	ⓘ Muscovite var. Illite	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
Al	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
Al	ⓘ Milarite	K(◻H₂O)Ca₂(Be₂Al)[Si₁₂O₃₀]
Al	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Al	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
Al	ⓘ Scolecite	CaAl₂Si₃O₁₀ · 3H₂O
Al	ⓘ Stilbite Subgroup	M_6-7[Al_8-9Si_27-28O₇₂] · nH₂O
Al	ⓘ Heulandite-Ca	(Ca,Na)₅(Si₂₇Al₉)O₇₂ · 26H₂O
Al	ⓘ Amphibole Supergroup var. Byssolite	AX₂Z₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Si	Silicon
Si	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
Si	ⓘ K Feldspar var. Adularia	KAlSi₃O₈
Si	ⓘ Albite	Na(AlSi₃O₈)
Si	ⓘ Quartz var. Amethyst	SiO₂
Si	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Si	ⓘ Apophyllite Group	AB₄[Si₈O₂₂]X · 8H₂O
Si	ⓘ Clinochlore	Mg₅Al(AlSi₃O₁₀)(OH)₈
Si	ⓘ Datolite	CaB(SiO₄)(OH)
Si	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Si	ⓘ Muscovite var. Illite	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
Si	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
Si	ⓘ Milarite	K(◻H₂O)Ca₂(Be₂Al)[Si₁₂O₃₀]
Si	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	ⓘ Phenakite	Be₂SiO₄
Si	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
Si	ⓘ Quartz	SiO₂
Si	ⓘ Scolecite	CaAl₂Si₃O₁₀ · 3H₂O
Si	ⓘ Seidozerite	Na₄MnZr₂Ti(Si₂O₇)₂O₂F₂
Si	ⓘ Quartz var. Smoky Quartz	SiO₂
Si	ⓘ Stilbite Subgroup	M_6-7[Al_8-9Si_27-28O₇₂] · nH₂O
Si	ⓘ Titanite	CaTi(SiO₄)O
Si	ⓘ Quartz var. Rock Crystal	SiO₂
Si	ⓘ Heulandite-Ca	(Ca,Na)₅(Si₂₇Al₉)O₇₂ · 26H₂O
Si	ⓘ Amphibole Supergroup var. Byssolite	AX₂Z₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Si	ⓘ Quartz var. Quartz Gwindel	SiO₂
P	Phosphorus
P	ⓘ Fluorapatite	Ca₅(PO₄)₃F
P	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
S	Sulfur
S	ⓘ Baryte	BaSO₄
S	ⓘ Chalcopyrite	CuFeS₂
S	ⓘ Galena	PbS
S	ⓘ Pyrite	FeS₂
Cl	Chlorine
Cl	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Cl	ⓘ Amphibole Supergroup var. Byssolite	AX₂Z₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Cl	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
K	Potassium
K	ⓘ K Feldspar var. Adularia	KAlSi₃O₈
K	ⓘ Muscovite var. Illite	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
K	ⓘ Milarite	K(◻H₂O)Ca₂(Be₂Al)[Si₁₂O₃₀]
K	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Ca	Calcium
Ca	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Datolite	CaB(SiO₄)(OH)
Ca	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Ca	ⓘ Fluorapatite	Ca₅(PO₄)₃F
Ca	ⓘ Fluorite	CaF₂
Ca	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
Ca	ⓘ Milarite	K(◻H₂O)Ca₂(Be₂Al)[Si₁₂O₃₀]
Ca	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
Ca	ⓘ Scheelite	Ca(WO₄)
Ca	ⓘ Scolecite	CaAl₂Si₃O₁₀ · 3H₂O
Ca	ⓘ Titanite	CaTi(SiO₄)O
Ca	ⓘ Heulandite-Ca	(Ca,Na)₅(Si₂₇Al₉)O₇₂ · 26H₂O
Ca	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
Ti	Titanium
Ti	ⓘ Amphibole Supergroup	AB₂C₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Ti	ⓘ Rutile	TiO₂
Ti	ⓘ Seidozerite	Na₄MnZr₂Ti(Si₂O₇)₂O₂F₂
Ti	ⓘ Titanite	CaTi(SiO₄)O
Ti	ⓘ Amphibole Supergroup var. Byssolite	AX₂Z₅((Si,Al,Ti)₈O₂₂)(OH,F,Cl,O)₂
Mn	Manganese
Mn	ⓘ Seidozerite	Na₄MnZr₂Ti(Si₂O₇)₂O₂F₂
Fe	Iron
Fe	ⓘ Actinolite	◻Ca₂(Mg_4.5-2.5Fe_0.5-2.5)Si₈O₂₂(OH)₂
Fe	ⓘ Chalcopyrite	CuFeS₂
Fe	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Fe	ⓘ Hematite	Fe₂O₃
Fe	ⓘ Pyrite	FeS₂
Cu	Copper
Cu	ⓘ Chalcopyrite	CuFeS₂
Cu	ⓘ Malachite	Cu₂(CO₃)(OH)₂
Zr	Zirconium
Zr	ⓘ Seidozerite	Na₄MnZr₂Ti(Si₂O₇)₂O₂F₂
Ba	Barium
Ba	ⓘ Baryte	BaSO₄
W	Tungsten
W	ⓘ Scheelite	Ca(WO₄)
Pb	Lead
Pb	ⓘ Galena	PbS

Localities in this Region

Switzerland

Grisons
- Surselva Region
  - Tujetsch
    - Val Giuv

Other Regions, Features and Areas containing this locality

Eurasian PlateTectonic Plate

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The AlpsMountain Range

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References

www.mineralienatlas.de (n.d.) https://www.mineralienatlas.de/?l=1164

Koenigsberger, J.G. (1940) Die zentralalpinen Minerallagerstätten. Wepf und Co. Verlag, Basel.

Labhart, T. (1977) Sammlung Geologischer Führer Nr. 63 - Aarmassiv und Gotthardmassiv. Gebr. Borntraeger, Berlin, Stuttgart, 173 pp.

Rykart, R., Giossi, R. & Berther, C. (1989). Amethystfarbene Zepterquarze, grosse Barytkristalle und Fadenquarzaggregate aus dem Val Giuv, Tavetsch GR (Neufund). Schweizer Strahler, No. 5, 196-201.

Sialm-Bossard, V. (1997) Der grosse Rauchquarzfund im Giuv-Syenit (GR) 1996. Schweizer Strahler 11(4), 162-174. (in German and French)

Jahn, S. (2004) Klassische Weltfundstelle: Val Giuv. Mineralien-Welt, 15(1), 34-61.

Sialm, V. (2004). Sensation aus dem Tavetsch - Ein großer Milaritfund im Val Giuv. Mineralienfreund, 42 (2), 10-13.

Sialm-Bossard, V. (2006). Eine Rauchquarz-Kluft im Giuvgletscher. Schweizer Strahler, No. 3, 6-13.

Wachtler, M. (Ed.) (2006) Surselva. Kristalle, Klüfte, Cavacristallas. extraLapis Nr. 31. Christian Weise Verlag, München.

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Val Giuv, Tujetsch, Surselva Region, Grisons, Switzerland i
Regional Level Types
Val Giuv Valley
Tujetsch Municipality
Surselva Region Region
Grisons Canton
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