A nice natural cluster of three clear crystals. A "natural" cluster is a cluster which did not need to be glued back together. Most crystals come out of the pockets loose. Many of them have markings like fingerprints on them. Those markings are from where one crystal grew up against another one. By finding matching markings, you can reconstruct crystal clusters into long chains. These chains are how the crystals actually grew in the pocket. All of the large clusters you see for sale are reconstructed clusters --- a natural cluster of more than three or four acorn sized or larger crystals is very rare.