Ottré, Bihain, Vielsalm, Luxembourg, Wallonia, Belgium (original) (raw)

ⓘ Andalusite

Formula: Al2(SiO4)O

Colour: blue

Description: Hercynian metamorphism: 1-2 kb, 380°C. Langer et al. (1984) have shown that the blue colour is due to a charge transfer between Fe2+ and Fe3+.

ⓘ 'Andalusite-Kanonaite Series'

ⓘ Ardennite-(As)

Formula: Mn2+4Al4(AlMg)(AsO4)(SiO4)2(Si3O10)(OH)6

Localities:

Ottré, Bihain, Vielsalm, Luxembourg, Wallonia, Belgium
Old manganese mine, Ottré, Bihain, Vielsalm, Luxembourg, Wallonia, Belgium

ⓘ Bornite

Formula: Cu5FeS4

ⓘ Carpholite

Formula: Mn2+Al2(Si2O6)(OH)4

ⓘ 'Chlorite Group'

Localities:

Ottré, Bihain, Vielsalm, Luxembourg, Wallonia, Belgium
Pagani quarry, Ottré, Bihain, Vielsalm, Luxembourg, Wallonia, Belgium

ⓘ Chloritoid

Formula: Fe2+Al2O(SiO4)(OH)2

Description: Hercynian metamorphism : 1-2 kb, 380°C.

ⓘ Cryptomelane

Formula: K(Mn4+7Mn3+)O16

ⓘ Davreuxite (TL)

Formula: MnAl6Si4O17(OH)2

Type Locality:

Habit: fibrous

Colour: creamy white to light pink

ⓘ Dickite

Formula: Al2(Si2O5)(OH)4

Habit: veinlets, masses, saccharoidal, platelets

Colour: milky to creamy white

Description: intimately associated with ottrelite, sudoite, pyrophyllite and/or quartz.

ⓘ Euclase

Formula: BeAl(SiO4)(OH)

Colour: whitish

Description: inclusions of up to 2cm in massive quartz associated with pyrophyllite, ottrelite, and davreuxite. Visually it is only distinguishable from the quartz by its perfect (010) cleavage.

ⓘ Gahnite

Formula: ZnAl2O4

ⓘ 'Garnet Group'

Formula: X3Z2(SiO4)3

ⓘ Gold

Formula: Au

ⓘ Hematite

Formula: Fe2O3

Localities:

Ottré, Bihain, Vielsalm, Luxembourg, Wallonia, Belgium
Pagani quarry, Ottré, Bihain, Vielsalm, Luxembourg, Wallonia, Belgium
Old manganese mine, Ottré, Bihain, Vielsalm, Luxembourg, Wallonia, Belgium

ⓘ Kanonaite

Formula: Mn3+Al(SiO4)O

ⓘ Kaolinite

Formula: Al2(Si2O5)(OH)4

Localities:

Ottré, Bihain, Vielsalm, Luxembourg, Wallonia, Belgium
Dados vein, Le Houlpaix quarry, Ottré, Bihain, Vielsalm, Luxembourg, Wallonia, Belgium

ⓘ Lithiophorite

Formula: (Al,Li)MnO2(OH)2

Habit: botryoidal crusts in cavities in quartz (Fransolet, 1979)

Description: Contains up to 3.19% of CuO.

ⓘ Magnetite

Formula: Fe2+Fe3+2O4

ⓘ 'Manganese Oxides'

ⓘ 'Mica Group'

ⓘ Muscovite

Formula: KAl2(AlSi3O10)(OH)2

Localities:

Ottré, Bihain, Vielsalm, Luxembourg, Wallonia, Belgium
Dados vein, Le Houlpaix quarry, Ottré, Bihain, Vielsalm, Luxembourg, Wallonia, Belgium
Old manganese mine, Ottré, Bihain, Vielsalm, Luxembourg, Wallonia, Belgium

Description: Existence of mixed-layer muscovite/paragonite. Hercynian metamorphism : 1-2 kb, 380°C.

ⓘ Muscovite var. Sericite

Formula: KAl2(AlSi3O10)(OH)2

ⓘ Ottrélite (TL)

Formula: Mn2+Al2O(SiO4)(OH)2

Type Locality:

Colour: pistachio green scales or aggregates at the contact with the quartz vein

ⓘ Paragonite

Formula: NaAl2(AlSi3O10)(OH)2

Description: intimately associated with muscovite

ⓘ Pseudomalachite

Formula: Cu5(PO4)2(OH)4

Colour: dark green

ⓘ Pyrite

Formula: FeS2

ⓘ Pyrophyllite

Formula: Al2Si4O10(OH)2

Habit: lamellar

Colour: yellowish to greenish-white

ⓘ Quartz

Formula: SiO2

Localities:

Ottré, Bihain, Vielsalm, Luxembourg, Wallonia, Belgium
Pagani quarry, Ottré, Bihain, Vielsalm, Luxembourg, Wallonia, Belgium

Colour: colourless to milky white

ⓘ Quartz var. Rock Crystal

Formula: SiO2

ⓘ Quartz var. Smoky Quartz

Formula: SiO2

Localities:

Ottré, Bihain, Vielsalm, Luxembourg, Wallonia, Belgium
Pagani quarry, Ottré, Bihain, Vielsalm, Luxembourg, Wallonia, Belgium

ⓘ Rutile

Formula: TiO2

Habit: acicular, most often 2-3mm in size but up to 1cm in quartz veins

ⓘ Spessartine

Formula: Mn2+3Al2(SiO4)3

Localities:

Ottré, Bihain, Vielsalm, Luxembourg, Wallonia, Belgium
Old manganese mine, Ottré, Bihain, Vielsalm, Luxembourg, Wallonia, Belgium

Description: Hercynian metamorphism : 1-2 kb, 380°C.

ⓘ Sudoite

Formula: Mg2Al3(Si3Al)O10)(OH)8

ⓘ Todorokite

Formula: (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O

Colour: black

Description: XRD analysis by R. Van Tassel (pers. comm.)

ⓘ Torbernite

Formula: Cu(UO2)2(PO4)2 · 12H2O

Localities:

Ottré, Bihain, Vielsalm, Luxembourg, Wallonia, Belgium
Pagani quarry, Ottré, Bihain, Vielsalm, Luxembourg, Wallonia, Belgium

ⓘ 'Tourmaline'

Formula: A D3G6 (T6O18)(BO3)3X3Z

ⓘ Turquoise

Formula: CuAl6(PO4)4(OH)8 · 4H2O

Localities:

Ottré, Bihain, Vielsalm, Luxembourg, Wallonia, Belgium
Pagani quarry, Ottré, Bihain, Vielsalm, Luxembourg, Wallonia, Belgium

ⓘ Vantasselite ?

Formula: Al4(PO4)3(OH)3 · 9H2O

ⓘ Variscite

Formula: AlPO4 · 2H2O

ⓘ Wavellite

Formula: Al3(PO4)2(OH,F)3 · 5H2O