Origin: Big Chief mine, Pennington Co., South Dakota, USA
Sample size: 5 x 4 x 3 cm
Pearly white thin bladed crystals to 5mm covering face and associated with
deep brown
jahnsite.
This is a superb specimen and is #5239 in the Barlow book.
Ex. Grenier collection
White, bladed messelite crystals to 5 mm, well exposed and associated with
abundant
leucophosphite as glassy light purple to brown micro crystals to 1.5 mm,
hureaulite crystals to 2 mm and yellow
jahnsite
crystals to 1 mm.
Very vuggy specimen with hollows everywhere filled with an amazing assemblage
of rare phosphate. The featured mineral here is the large white messelite
crystal blades to 6 mm protected deep in a pocket but very visible. The
backside(?) of the specimen is covered by flat lying messelite crystals.
There is also a well exposed crystal to 4 mm. Within all the pockets are
thousands of pink
hureaulite crystals to 2 mm with light yellow-green
jahnsite
crystals to about 1 mm.
robertsite and
leucophosphite micro crystals are also present. Ex. Grenier Collection &
Ex. Barlow Collection
Origin: Tip Top mine, Custer Co., South Dakota, United States
Sample size: 3.5 x 3 x 3 cm (top), 7 x 5 x 7 cm (2nd row), 7 x 7 x 5 cm
(bottom)
