This unique specimen seems to be an aquamarine overgrowing a heliodor core, with interesting green feathery inclusions which I have no clue what we are looking at. Depending on lighting and background, it is either a really blue aqua or a neon blue aqua...in either case, no matter how you look at it, the color is truly phenomenal and special. The color changes a bit in various lights, and so the video here is a more accurate representation of luster and shape, than of color. At the time I first bought and sold it in Tucson 2005 I was told that it was a freak piece, mined alone only several months before the show. I have not seen another like it, since. It is completely crystallized around all sides. The top is terminated, though with an interesting ridged texture to it like you more often see in heliodor than in aquamarine. Despite its fatness, it is remarkably pristine save only one ding on a back edge. I just think its a fantastic, colorful, and really interesting specimen. As well, the gem pegmatite prices are going up these days, its just a good large aqua at a fair price, anyhow. Weight on this hefty crystal is 352 grams. Comes with custom lucite base. Photo and video by Joe Budd. A video can be seen at this link: https://vimeo.com/198291764