Graphite-Bearing Rock from Kerala, India : 2012

Photograph by

Bernardo Cesare

About this image

Resembling a beautiful piece of abstract art, this is a polarised light photomicrograph of a graphite-bearing mineral. The coloured patches are pieces of quartz and feldspar with black graphite in between. This sample was found in Kerala, India, where such minerals could be commercially exploited as a source of graphite. Here a thin section of rock just 30 micrometres thick has been polished and polarised light shone through it. A second polarising filter reveals these amazing colours. Photographed using a Canon EOS 550D camera on a Zeiss Axioscop microscope. Dipartimento Di Geoscienze, Università Di Padova, Padova, Italy