The big selenite crystal you are looking at is so clear that you see right through it to the chrysocolla inclusions inside! This is a razor-sharp crystal on a superbly-trimmed matrix. It is difficult to see the form of the crystal from the pic, since it is so clear.but it is not thin; it is a flattened rhombohedron, leaning back on the matrix. Better in person, really DRAMATIC, in person and you will love this piece; guaranteed! 9 x 6 x 5 cm