Dear Hive Community, first of all I would like to welcome you all to my new post and hope you are all well and have a great start to the new week! Today I would like to bring you a mineral a little closer and hope you can expand your knowledge a little.
The specimen that can be seen here bears the name Ullmannite and it belongs to the mineral class of sulfurides and has a gray or silver color. Ullmannite was first described in 19. Century by the German mineralogist Julius Fröbel (1805 - 1893) who honored the mineral to Johann Christoph Ullmann (1771 - 1821). The formation can be traced back to hydrothermal origins and it is a rather rare mineral that has been found at about 250 different locations to date and the best-known places of discovery include Australia, Germany, Spain, USA and Norway. By the way, there are over 6000 minerals worldwide and some are still unknown and according to estimates there are about 2000 which have still not been discovered. Ullmannite is often found together with other minerals such as galenite, chalcopyrite or dyscrasite and it usually develops cubic crystals and tends to form twins. The mineral reacts to environmental influences and should always be stored airtight because due to too much time in the air it can change the color and it becomes blacker and due to the rarity it is not of economic interest and is particularly popular in collectors circles.
Many thanks for stopping by and I hope you could learn something new about minerals! I captured these pictures with my Camera Sony Alpha 6000 plus 55-210 mm lens!
