Optical mineralogy is the study of minerals and rocks by measuring their optical properties. Most commonly, rock and mineral samples are prepared as thin sections or grain mounts for study in the laboratory with a petrographic microscope. optical properties of minerals .Minerals are conveniently identified based on their physical properties. These properties include luster, ability to transmit light, color and streak. relief in optical mineralogy Optical relief (usually noted as simply relief) is a concept in optical mineralogy which refers to the degree in which mineral grains stand out from the mounting medium, usually either oil with a known refractive index or Canada Balsam. Relief is an important part of the Becke line test.
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