Anorthosite and oil on canvas. Anorthosite is found across the lunar highlands and is amongst the oldest rocks on the moon. It was included in samples brought back from the Apollo missions. My piece was sourced from Norway.
Anorthosite is a relatively hard rock so took quite a lot of time and effort to grind. A process called levigation was then used (suspending in water so the heavy particles sink, then pour off the water containing the fine particles) and once completely dry I had a very fine powder.
The paint worked incredibly well, with the additions of white and black it was possible to achieve the full range of tones for the moon. It also resulted in a rough gritty surface texture in parts.