A transparent, doubly-terminated, 3.5-cm aquamarine (along with some smaller ones) is intergrown with a large, doubly-terminated crystal of schorl tourmaline (with a fibrous termination at one end). The light-colored mineral is feldspar, which has formed an unusually sharp 4 cm crystal in diagonal growth, right next to the large aqua. Intricate and aesthetic! Ex. Charlie Key Collection.