This topaz crystal is from Virgem da lapa in Minas Gerais, Brazil. This area contains several mines and diggings in gem and mineral crystal pegmatites. It has 33 known different mineral species including topaz. It s a silicate that contains the elements Al, Si, F, O and H. Pure crystals are colorless but it can be found in a variety of colors depending on the trace elements incorporated in the crystal lattice. This is a light blue crystal floater with original and/or hydro-thermally altered surfaces on all sides.Photo 1 shows the original prism faces and the original morphology. It is transparent with a glass luster and has some mica crystals attached The crystal measures approximately 1 3/4 x 1 9/16 x 1 1/16 inches or 45 x 39 x 26 mm.