Starship Debris Found

A friend of a friend visited Turks and Caicos right after the R.U.D. was able to get some debris and now I want to know which part of the spacecraft it is. I've got some "tile" and "thermal material" (as others have described it on eBay). Is the tile the actual exterior? I thought it was stainless steel but this is a white almost coral like consistency with a black paint? The thermal material is like a thin car mat. Is the material makeup actually known? Curious to know more