Specimen consisting largely of
jordanite
crystals to about 1 mm in size. Nestled in amongst the
jordanite
is at least one superb quadratic crystal of quadratite perhaps about 0.5mm in
size. At one end of the specimen is a thin coating of tan coloured massive
greenockite. Right at one edge of the specimen is a tiny pocket containing
a single very dark grey – almost black – crystal of
lengenbachite (indicated with a white arrow) measuring about 0.5 mm in
length.
Specimen comprising the usual white microcrystalline
dolomite
with several small patches of tiny crystals of
pyrite.
Three faces of the specimen are quite highly mineralized with an aggregate of
closely packed lead grey quadratite crystals measuring 3.5 x 3 mm and
aggregates of lead grey
jordanite.
The larger of the two
jordanite
aggregates measures 7 x 5 mm with individual crystals reaching up to 2 mm.
Also associated is sub-microscopic
smithite
that is only detectable by SEM.
Dolomite
matrix with very minor amounts of small crystals of
pyrite.
At one end of the specimen there are two highly mineralized patches the larger
of which measures 10 x 9 mm and which is comprised largely of a crystalline
mass of lead grey
jordanite.
The smaller of the two patches measures 15 x 5 mm and consists of a group of
lead grey quadratite crystals measuring 3 x 2 mm with quadratite crystals
reaching up to 2 mm in size. The remainder of the patch is comprised of
jordanite
with other crystals of quadratite. Also associated are sub-microscopic
crystals of
xanthoconite that are only visible by SEM.
Origin: Lengenbach quarry, Binntal, Wallis, Switzerland
Sample size: 3 x 2 x 3 cm with a 20 x 8 mm vein (top), 4.5 x 2 x 2.5 cm (2nd
row), 3 x 2 x 2 cm (3rd row), 6.5 x 5.5 x 2 cm (bottom)
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