AussieMe

The photos don’t really show the colour of the crystals very well. They are actually deep red in colour. And having looked up realgar and orpiment which states bright red and bright orange I would say that it isn’t that. I cleaned the sample in water and the green side of the rock seems to be becoming more green in colour which makes me think copper?

This was found at Tennant Creek, Northern Territory, Australia. The crystals are deep red in colour. One side of the rock is green ( hard to see in the picture).