Image
A thin section (a 10-millimetre-wide microscope slice) of dunite from Dun reveals the beautiful coloration, under polarised light, of interlocking grains of olivine. The small black grains are chromite, which is opaque under the microscope.
Te whakamahi i tēnei tūemi
by Nick Mortimer
Permission of GNS Science must be obtained before any use of this image.