Platinum is a commercially valuable metallic native element, prized for its physical resistance to chemical and temperature assault, its ductility and malleability, and its utility in enabling catalytic reactions. It is also a precious metal and in the natural form also a rare collecting asset.
The amphibole supergroup is a group of more then hundred rock-forming silicates. This article provides general introduction to structure, physical properties and chemical composition of amphiboles.
Detailed photo report from the 2019 visit of the famous Uri Mineral Museum in Seedorf, Switzerland. The mineral exhibition includes wide variety of the high quality Alpine minerals.
Small opal occurence is located in the serpentinite rocks near the Rožná village, Czech Republic. It yields uncommon opal material with reticulated structures, some of these opals also contain chromite.
Melanterite is a perishable product of iron ore weathering, forming awesome green stalactites and crusts in the abandoned mines. Its shaky existence is a nice example of natural processes, but admiring melanterite beauty often includes trips to hardly accessible underground places.
