This heliodor is from Galileia in the Doce Valley, Minas Gerais, Brazil. This area is located in the Aimores pegmatite district which contains 138 different mineral species. Heliodor is the yellow ( golden ) variety of beryl. Pure beryl is colorless and different colors like aquamarine and emerald and heliodor get their color from trace elements included in the crystal lattice. This specimen is a double terminated crystal that was altered in hydrothermal fluids after it’s original crystallization (a floater). Three prism faces are almost untouched while the other three are modified and cover a partially hollow core. It is double terminated with a healed termination on the base and modified multiple-terminations on the other. It is transparent with internal flaws and it has a glass luster. It measures 1 3/16 x 5/16 x 1/4 inches or 31 x 8 x 6 mm.