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Albite
NaAISi3O8
Albite, a member of the feldspar group, is one of the most common minerals. It
occurs as colourless crystals
; size from 0.2 -5 mm length. Normal shape, often twins.
Anatase
TiO2
Anatase occurs as a rare accessory
mineral. The colour is yellow to fair brown, size up to 0.3 mm.
Aragonite
CaCO3
Aragonite is also a common mineral
at Parsettens . It occurs as white to colourless crystals, the size of the aggregates is up to 16 mm across.
Ardennite
Mn4(AI,Mg)6(V,As)O4(SiO4)2(Si3O10)(OH)6
Ardennite occurs
as aggregates of platy, transparent yellow to copper-red crystals,
associated with braunite, quartz, barite. tinzenite, manganoan calcite and
rhodochrosite. The length of the tabular crystals is about 0.3 mm.
Arsenoflorencite-(Ce) CeAl3[(OH)6|(AsO4)2]
White, trigonal crystals of 0.3 mm in size on radiolarite,
Together with quartz, albite, anatase and very seldom with tilasite.
Arseniopleite
NaCaMn2+(Mn2+,Mg)2(AsO4)3
Aggregates of
crude brown-red xx of 0.5 mm size.
Barite
BaSO4
Barite is
a very common mineral at Parsettens. It has been found as white masses of
several cm in size or as crystals up to 10 mm.
Birnessite
Na4Mn15O27
·
9H2O
Birnessite is a secondary manganoan oxide, it occurs as minute black
crystals and grains.
Braunite
Mn2+Mn3+SiO12
Braunite is the main ore mineral of the location, it occurs together with
radiolarite as tiny crystals up to 0.2 mm.
Calcite
CaCO3
Calcite occurs as white to colourless, scalenohedral and rhombohedral
crystals often covered with manganese oxides. The crystals are up to 3 mm in length.
Chalcedony
SiO2
Chalcedony has been found as white balls and resinous crusts.
Hematite
Fe3+2O3
Hematite
is of minor importance, it occurs as bad developed plates embedded in
massive tinzenite, and its size is up to 2 mm.
Lindbergite
Mn[C2O4] • 2H2O
Lindbergite, a manganoan oxalate, occurs as greyish white crystals
up to 0.5 mm in length. The mineral is extremely rare.
Malachite
Cu2[(OH)2CO3]
Occurs as poor coatings and crusts. Malachite is of minor
importance.
Manganberzeliite
(NaCa)3(Mn,Mg)2
(AsO4)3
It has
been found as crude to well formed garnet like crystals of yellow to
orange-yellow or brown-yellow colour. The mineral is very brittle and good
crystals are extremely rare.
Manganite
Mn3+O(OH)
Tiny pseudo cubic crystals of 0.5 to 1 mm in size.
Manganoan
calcite
Is very common, it occurs as small white veins in braunite ore and only
rarely as white to pink crystals of about 0.1 to 0.3 mm size. Manganoan calcite
fluoresces intense orange-red under shortwave ultraviolet radiation.
Muscovite
KAI2(AISi3)O10(OH,F)2
Occurs as
small white to colourless aggregates. Associated minerals include albite,
quartz, sursassite and piemontite.
Opal
(Hyalite)
SiO2
· nH2O
Colourless resinous aggregates on quartz of 0.3 mm in size.
Parsettensite
KMn6Al7Si8O20
· 2H2O
Parsettensite is a member of the mica group and relatively common. It
occurs mostly as mica-Iike blades together with tinzenite, sursassite,
piemontite, rhodonite, manganoan calcite, quartz, albite and barite. The colour is brown to copper-red.
Parsettensite is named after the original locality, Parsettens Alpe. Type
locality.
Piemontite
Ca2(AIMn3+)3(SiO4)30H
Piemontite is a mineral of the epidote group and occurs as nice wine red
needles up to 5 mm length, in cavities together with quartz crystals.
Quartz
SiO2
Is very
common and occurs as crystals up to 3 cm. Very interesting are inclusions
of braunite, haematite, radiolarite, piemontite and tinzenite. Often nice
phantoms with inclusions of radiolarite can be observed.
Rancieite
(Ca,Mn2+)Mn4+4O9•3H2O
-Takanelith (Mn2+,Ca)Mn4+4O9•H2O
The secondary manganoan-oxide is present as a mixture of rancieite-takanelite.
It is very common and occurs as black, brown to silvery crusts or as acicular
sprays and tufts.
Rhodochrosite
(Mn,Ca)CO3
This
mineral is very rare and occurs as white to pink crystals together
with manganoan calcite. Its size is up to 0.2 mm.
Rhodonite
Mn5Si3O13
Rhodonite
is very common in lenses, crossed by veins of manganoan calcite,
parsettensite, tinzenite, quartz and braunite. The surface is due to
oxidation black. Crystals are very rare and of salmon red, pink or red
brown colour, translucent and seldom transparent.
Sursassite
Mn2AI3(Si,O4)(Si2O7)(OH)3
Sursassite is very common and occurs as veins of parallel grown needles or
as aggregates of fibbers of 2 to 3 mm length together with calcite. Its
colour is copper red. Sursassite is named after the roman name for
Oberhalbstein, Sursass. Type locality is Parsettens Alpe.
Tilasite
CaMg(AsO4)F
The tilasite of Parsettens is colourless to yellowish, transparent. The
size is about 0.5 in length. Tilasite is associated with quartz,
anatase and arsenoflorencite-(Ce).
The occurrence is exceedingly rare.
Tinzenite
(Ca.Mn,Fe)3AI2BSi4O15(OH)
Tinzenite is a variety of axinite, it occurs as yellow to brownish
crystals at Falotta and as nice, orange coloured crystals up to 3 mm at
Parsettens. The name is from the community Tinzen (today Tinizong). Type
locality is Parsettens Alpe.
Todorokite
(Mn2+,
Ca,Mg)Mn4+3O7 · H2O
Todorokite occurs along cleavages as black to brown-black sprays of
several millimetres size. |