sample raw specimen of granite igneous rock stone on geologist's hand.

39aph39 age andesite art asphalt attach background ballast bedrock black boulder carbon civil close-up coal contexts crush cutout engineer engineer39aph39s erupted extrusive floor flooring formation formed fossil fragment fuel geologist geology granite hand hard holding igneous intrusive iron jewellery lava macro mineral natural nature object ore pattern paving piece plutonic rail railway raw rhyolite rock rough s sample scientific shortened sleepers soil solid specimen stone stones stonewall terrain texture used volcanic volcanics volcano wall white wood