A complex specimen from the famed Langban locality with several species well represented. This features several large areas black Langbanite with some sharp crystals to several MM in size. Also nestled in a shallow vug are blocky crystals of pink Rhodonite that are vividly Fluorescent. Most Rhodonite worldwide is not at all fluorescent but this has intense red to orange red response in long wave. This Langbanite is of course from the type locality, it is a quite rare Manganese Silicate specie and not very often available. Ex John Marshall collection, his label is included.
A sizable and well crystalized red-brown Richterite from Langban that is outstanding for this classic locality. Ex John Marshall collection he obtained it in 1992. His collection card notes that he showed it to Carl Francis who said it was "considerably better than the two specimens at Harvard in the Langban case. I checked and it is" He also notes he felt it "equivalent to the specimen on display at the British Museum". All that said there are larger crystals known from several other locales, but this color and habit seem to be unique to Langban, all the other worldwide specimens are black, colorless or a light yellow. Langban minerals tend to be a bit ugly, or microscopic, this is actually a displayable, cabinet sized crystal specimen. Though not an ultra showy, pretty mineral, this is a significant and fine specimen. Crystals to 1.6 CM, there is some damage but also several complete crystals, the smallest are transparent.