Cut from beautiful high grade silver sheen obsidian, these coffins are flat on each face with beveled edges. They range in size from approximately 12x19.5mm to 22x33mm. While the material is extremely high grade, sadly many of these pieces have imperfections. Most of them have green polishing compound stuck in them, giving them a cool ghoulish appearance. I personally think it makes them really cool for Halloween projects. Other pieces have scratches on the edges and a few on the face. They are sold per randomly selected piece. Please note that the mixture is primarily the higher quality silver/grey shade.