For sale: Educational geological box containing 50 original rock and mineral samples, suitable for geology students, science teachers, colleges, and rock and mineral collectors. Contents of the collection: • Basalt. • Granitic Rhyolite. • Andesite. • Granite. • Diorite. • Gabbro. • Obsidian (volcanic glass). • Hornfels. • Slate. • Quartzite. • Limestone. • Sandstone. • Arkose. • Dolomite. • Conglomerate. • Shale. • Extrusive rock. • Volcanic rock. • White mica (muscovite). • Black mica (biotite). • Quartz. • Amphibole. • Augite. • Feldspar. • Calcite. • Gypsum. • Sulfur. • Anthracite coal. • Bituminous coal. • In addition to a number of other mineral and rock samples as shown in the pictures. Features: • All samples are arranged and numbered in one box. • Suitable for study, display, and collection. • Good condition. Price: 900 SAR (reasonably negotiable)