This is a beryl crystal, variety aquamarine, from the Skardu District in Baltistan, Gilgit-Baltistan, Pakistan. Skardu is an immense district that contains hundreds of known pegmatites and dozens of active mines that are producing a variety of gemstone crystals including aquamarine beryl. Beryl is clear and colorless in it’s pure form however it can be found in a variety of colors from red to emerald depending on trace elements in the crystal lattice. It is a beryllium-rich silicate that contains the elements Be, Al, Si, and O. This is a double terminated transparent and glassy crystal that has a feldspar and tourmaline crystal matrix attached. One termination is flat and the other has an indentation with remnant feldspar matrix attached. This piece measures 1 7/8 x 11/16 x 7/16 inches or 47 x 18 x 11 mm.