The two massifs of the Khibina and Lovozero in the Kola peninsula hold approximately 500 minerals, exceeding that of any other mineral location in the world. This book provides a systematic description of the hyperagpaitic rocks of the massifs, and all their characteristic minerals. Detailedattention is given to the physio-chemical conditions of their formation, and their significance as ore guides and carriers. Originally published in Russian in 1990, it has been completely updated and will provide a welcome reference for all professional mineralogists interested in this excitingregion.