Detailed information
Species
Nadorite
Dimensions
69 x 58 x 23
mm
Weight
180 g
Locality
Långban Filipstad, Värmland Sweden
Condition
No recorded repairs
Nadorite is an extremely rare secondary lead mineral in antimony-bearing hydrothermal deposits and is named after the Nador N'Bails mine in Algeria where it was first found. The geologically complex and mineralogically diverse Långban deposit in Sweden - a favourite amongst rare species collectors - is one of the few other places where Nadorite has been identified. This very large miniature specimen from the remarkable systematic collection assembled by brothers Martin and Michael Günther (1951-2007 & 1956-2021) is richly covered in creamy yellow tabular microcrystals of Nadorite on two sides of an unidentified dense grey metallic matrix (possibly Magnetite). On the side shown in the photograph (unfortunately not shown in the video) the cavities containing Nadorite also host tiny silky white sprays of acicular crystals. Similar crystals have been suggested online to be Manganohörnesite, but they have not been tested. There are other microcrystals too on this piece which might warrant further study. Several old collection number labels are attached to this specimen all of which predate the Günther's ownership. A fine rarity from Långban.