Board Thread:Speculation House/@comment-66.87.120.108-20150303155657/@comment-25555436-20150321020948

Well, stone is grey. And I don't know about you, but I didn't see any white Dust there. However, I did see grey Dust in the first pic. First from center-to-left, right at Red's side.

As for the shades of orange, I'm sure one, more likely the darker one, is Earth, which wouldn't necesarily be Stone. More likely, Stone is obtained from Earth.