How to Identify Beach Pebbles Rocks
14/07/2020· Break open your pebble or rock with the rock hammer. Look at the internal make up of the stone, at the size and layering of the crystals. Gneiss, for example, has fine multicoloured crystals, slate is made up of many layers and basalt contains a huge amount of densely packed, very fine crystals. Try to scratch the pebble or rock with your fingernail. If no line appears, do the same with a coin






































