This course is a course that discusses rocks, the main aim of which is to make it easier for students to determine various types of rocks megascopically, including igneous rocks, clastic and non-clastic sediments, metamorphic and pyroclastic. Determining the type of rock is preceded by a discussion of crystals and the characteristics of minerals as rock-forming materials. The next discussion is the process of formation and location of rock formation as well as the various structures, textures and colors of each type of rock which constitute the character of the rock. Understanding the character of rocks is basic knowledge that must be mastered, then by identifying the rock you will be able to know its type. The use of information technology in this activity will make it easier to understand various types of rocks. Achievement of learning competencies by using a project based learning approach with inquiry, discussion, question and answer, assignment methods. Assessment is carried out by performance and written tests