Characteristics of Orthorhombic Crystals 3 crystallographic axes of unequal length that make angles of 90 degrees with each other three 2-fold symmetry axes Rhombic dipyramid Prism Scalenohedron Common Minerals of the Orthorhombic System Sillimanite Andalusite Anthophyllite Aragonite Barite Brookite Chrysoberyl Columbite Cordierite Danburite Enstatite Goethite Marcasite Olivine Stibnite Sulfur Topaz

Crystal Systems/All About Crystals