Fuchsite, also referred to as chrome mica has the chemical formula KAl2(Si3Al)O10(OH)2 The colour can vary from pale green to deep emerald green, and is dependant on the amount of chromium. This specimen has quite a deep green colour, and has a silvery sheen in places. It was collected by our clubs co-founder, Jim Nicholls while living in Western Australia, possibly from a deposit at Cookes creek.