Diaphorite
Diaphorite is a very rare diamond-shaped silver sulfoantimonide, which is characteristic of some hydrothermal deposits of polymetallic ores. Unique occurrences of diaphorite have been described, for example, from Bolivia or Romania. In our country, his finds are especially famous for the localities of Příbram and Kutná Hora - Poličany. In Příbram, it was reliably found in the Březová Hora deposit, which is part of the Březohorské ore district. It was also described from a uranium deposit, but only as a rare accessory. In this paper, we will focus on the findings of diaphorite in the Březohorské ore district, which are among the best in the world. It was first described from the Vojtěš main vein by Reuss in 1857 as freieslebenite, in 1871 Zepharovich correctly showed according to diamond symmetry that it is a different mineral - on this basis he described diaphorite and mentioned its first occurrence in Příbram and in the world. The crystallographic description of the Březohorské diaphorite is given by Hofmann and Slavík (1910): "In the ring, the diaphorite crystals are vertically columnar, flattened according to one pair of surfaces. In addition to single crystals, there are also conjugates with oblique axes, twins and triplets, either with an even development of individuals or with a few small ones grown on the main individual in one or two twin positions.In the vertical band, all crystals are longitudinally grooved. very similar to the stronger individuals of boulangerite, with which they match the steel-gray color and the strong metallic luster. " More info
