Kermesite, Kolarsky Vrch, Pezinok, Slovakia

Also known as "red antimony", kermesite is a antimony oxysulphide which is certainly an uncommon combination of elements. Beautiful and rare aptly describe kermesite and our example does not disappoint. Recently acquired from a Calgary collection, this cabinet-sized specimen of ore shows several radial crystal groups of kermesite. The metallic ruby red colour of the acicular crystals is stunning. Other species are present but I have yet to identify them. This big specimen weighs almost 4 kg and measures 10 x 14 x 15 cm. The largest radial crystal spray has a diameter of over 3 cm. From Nova Alexander Adit, Kolarsky Vrch, Pezinok, Slovakia