The large-scale use of modern high-precision research methods in the study of Pitkäranta ores has shown that they contain quite a number of earlier unknown ore minerals, such as roquesite, zavaritskite, electrum, stutzite, altaite, bismite, glaucodote, servelleite, hedleyite, cannonite, plattnerite, lindquistite, ashoverite and several unidentified mineral phases. Metallogenically, the discovery of roquesite and electrum is most important. Indium sulphide, roquesite, has been discovered in Karelia for the first time. Base-metal ores from the Pitkäranta deposits were found to contain high percentages of indium (up to 0.5% In), the concentrating mineral of which is sphalerite
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