- Alstonite, Baryte
- Miniature, 4.3 x 3.4 x 3.0 cm
- Brownley Hill Mine (Bloomsberry Horse Level), Nenthead, Alston Moor District, North Pennines, North and Western Region (Cumberland), Cumbria, England, UK
Alstonite is a very rare barium, calcium carbonate and this fine combination specimen from the co-type locality features a sharp, 1.2 cm, pseudo-hexagonal dipyramid set amidst sugary, snow-white baryte crystals on a bit of sulfide matrix from the historic Brownley Hill Mine of England. This is an excellent combination specimen of this rare species and classic locale. Ex. Mullane Collection.