A class set of 12 large rock specimens supplied in a Gratnells tray with lid. IncludesGranite (Cornwall) Basalt (Antrim) Andesite (Somerset) Gabbro (Wales) Sandstone (Shropshire) Limestone (Gloucestershire) Chalk (Hampshire) Bubble Basalt (Iceland) Oxford Clay (Oxfordshire) Marble Schist (Iona) Slate (Wales)Each specimen is approximately 50 x 50 x 50mm.Laminated flow chart and Teaching notes included.