Abstract: Method and apparatus involving the use of an X-ray video fluoroscope for nondestructive analysis of rock samples, including core obtained during the drilling of wellbores through subterranean strata, to determine the presence, location, and orientation of any internal features, or to monitor the flow of fluids through the rock sample. Rock samples can be both moved through and rotated in the analysis zone of the X-ray video fluoroscope and the visible light image obtained from the X-ray video fluoroscope can then be viewed, recorded photographically or on video tape, or digitized to facilitate computer implemented storage, retrieval, and digital processing of the X-ray video fluoroscope image.