sentences:  Heazlewoodite is known from few ultramafic intrusions within terrestrial rocks.The Honeymoon Well ultramafic intrusive, Western Australia is known to contain heazlewoodite-millerite sulfide assemblages within serpentinized olivine adcumulate dunite, formed from the metamorphic process.The mineral is also reported, again in association with millerite, from the ultramafic rocks of New Caledonia.