ABSTRACT
In the Central Rhodopes ilvaite was systematically investigated in the most representative deposits of two types: Ossikovo-Mogilata, and Byal Izvor, respectively. Microscopic and SEM investigations on the mineral relations show that it often occurs as a product of retrograde alterations of skarns, and accompanies the main sulphide mineralization. The key chemical characteristic of the mineral is an increased Mn content, common for such skarns, but in these deposits reaching high and extremely high values.
