This really surprised me! In fact, I was not able to guess what it was without seeing the label. It is a SHARP, GEMMY, TRANSPARENT albite crystal. In person it is much sharper and gemmier, as its hard to photograph both the shape and transparency at the same time so we had to aim the light to frost part of the crystal in order to get all edges to show up on the photo. One almost never sees gemmy, euhedral crystals of albite, and it looks for all the world like a colorless spodumene. Found in 1996 in the Bennett Mine. From the specialized Maine thumbnail collection of Jim Mann.