Petrographical museum is - one of the oldest museums of St. Petersburg state university, one of the first of this type of profile museums. Museum left the depths of the geological museum of St. Petersburg university oldest in Russia. The unique collections of museum began to be formed in the second-half XIX of century. At the sources of the creation of petrographical collections stand well-known scientist-geologists - the founder of the department of geology of the professor A.A. Foreigners, the department of petrography - F.YU. Levinson -Lesssing. In the museum the regional collections of the rocks of Russia were formed. Through the well-known commercial foreign firms in Bonn (B. Sturtz, F. Krantz), in Heidelberg and Geneva were extracted the collections of samples of petrotipicheskikh rocks to the basic textbooks on petrography G. Rozenbusha and F. Tsirkelya. The collection fund of the museum of the department of petrography reflects entire intensive dynamics of the development of petrology. At the present time, the museum of the department of petrography possesses the rich collection fund, which counts more than 10000 the units of storage. The funds of museum include, besides the systematic and training, the most diverse subject, monographic collections. They reflect the special features of the composition of species on different regions, and also the wide spectrum of the scientific directions of petrology. Into their composition enter the collections of the species of Khibinskiy and Lovozero plutons, massif of Gremyakha-Vyrmes, it is vulcanite Kamchatka, Kara-Dag, metasomatic and metamorphic rock, shungites of Karelia and many others