Sperrylite

Platinum arsenide sperrylite is the only described mineral containing platinum that, apart from pure platinum, forms crystals visible to the naked eye. This makes it an extremely attractive object of interest to mineral collectors worldwide. An extraordinary feature of this mineral is its abnormally high reflectivity, which reaches 55%. Yes, a sufficiently large crystal can really replace your mirror! Its brilliance will captivate every observer. The specimen comes from the Russian locality of Talnach – the only active locality of this mineral in the world, located 300 km north of the Arctic Circle!