This aquamarine beryl is from Teofilo Otoni, Mucuiri Valley, Minas Gerais, Brazil. This area contains 22 mineral species including aquamarine. Aquamarine is the blue gem variety of beryl and it contains the elements Be, Al, Si and O. Different colors of beryl such as aquamarine are produced when there are trace elements in the crystal lattice. This specimen consists of is a pair of parallel twin double terminated, aquamarine crystals. They have been recrystallized in hydrothermal fluids and have terminated surfaces on all faces (floaters). The faces are lightly etched and have a bright glass luster. They are transparent and have a light aqua color that is hard to catch in photos. It measures 1 1/2 x 5/8 x 7/16 inches or 38 x 16 x 11 mm in size.