Ramsdellite (classic material)

Item Description

Ramsdellite is a dimorph of Pyrolusite and according to mindat.org, "forms by inversion of Pyrolusite or oxidative dehydrogenation of Groutite". This is a classic specimen of Ramsdellite from the type locality, and most likely famously collected by Dick Jones, according to his son Roy. This is not a muddled mass, but rather a good piece featuring sharp, softly lustrous orthorhombic prismatic crystals sitting atop a massive Ramsdellite matrix. The species is really only found in a few places in the world in superb crystallized examples, with the finest pieces coming from Lake Valley. This piece has very little damage, save the periphery where it was removed from the pocket. The luster is what I would call "directional" as it seems to change when rotated in the light, and appears brighter at certain angles than others. The largest individual crystal measures about 7 mm. Priced at $600 in the inventory. If you collect New Mexico minerals, or good examples of U.S. minerals, do not miss out on this one.