This is a very detailed colour atlas for ore/opaque minerals (ore microscopy) with the main emphasis on: name and synonyms, mineral group, chemical composition, information about major formation environment, optical data, reflection colour/shade comparison with 4 common/standard minerals of a similar colour or grey shade, up to 5 high-quality photos for each mineral with scale, and a short description of the pictures. A compilation from some of the prominent publication in the field of ore microscopy yielded a list of 410 minerals are included in this atlas. It is a concise full colour pictorial reference for scientists and geologists. It explains how to describe and identify microscopic samples of minerals. It draws material from prominent literature yielding over 400 different minerals.