Rock Type: Dunite
Location: Nunavut, Canada
Description: The section is dominantly birefringent (bright coloured) actinolite amphibole laths interstitial to intensely serpentinized (altered by the addition of water) olivine (grey-white). Retrogression or breakdown of the actinolite and olivine has resulted in chrome- and titanium-rich magnetite (black) growth along cleavage planes (internal fracture planes) of the actinolite. The rock was studied for its diamond potential. A dunite is an ultramafic rock that forms from a magma that was sourced from deep mantle; where diamonds form.