Consists of 30 superb samples. Includes: Andesite, Barite, Basalt, Biotite Mica, Bubble Basalt, Calcite, Carboniferous Limestone, Chalk, Coal, Fluorite, Garnet Mica Schist, Gneiss with garnet, Gypsum (Anhydrite.), Labradorite Feldspar, Larvikite, Marble, Muscovite Mica, Oolitic Limestone, Orthoclase Feldspar, Pumice, Quartzite, Rhyolite, Rose Quartz, Sandstone, Slate, Sphalerite, Sulphur, Talc, Talc Schist, Unakite. Supplied in a Gratnells tray.