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A class set of 12 large rock specimens supplied in a Gratnell's tray, with lid. Includes granite (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.
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