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.