COLLECTION AND JEWELLERY CASSITERITES OF THE IULTIN DEPOSIT

• Published in: Proceedings of higher educational establishments. Geology and Exploration
• Main Author: D. A. Petrochenkov
• Format: Article in Journal/Newspaper
• Language: Russian
• Published: Sergo Ordzhonikidze Russian State University for Geological Prospecting 2018
• Subjects: касситерит; коллекционные и ювелирные минералы; месторождение олова иультин; Geology; QE1-996.5; Iultin; Chukotka
• Online Access: https://doi.org/10.32454/0016-7762-2018-1-76-80; https://doaj.org/article/4001ff3dff4448f79cd86eabeb185567

The large crystals of the collection and jewellery quality (including the crystals unique by size) have been found at the Iultin deposit (Eastern Chukotka). The jewellery ones are connected with veined morphological type of the ore bodies and located in the mineralized cavities and muscovite fringes. A black colour of cassiterite is conditioned by large number of the zones of the growth which absorb passing light. Significant by volume colourless and different-coloured fragments can be found in crystals. They can be used for faceting of high quality. The cassiterite of collection and jewellery quality is an important factor of profitability's raising in exploitation of tin deposits.