This is a Topaz from Brazil. It has a beautiful pink and orange colour.
Pure Topaz is colorless and transparent but is usually tinted by impurities; typical Topaz is wine, yellow, pale grey, reddish-orange or blue brown. Typically, colourless, grey or pale yellow and blue material is heat treated and irradiated to produce a more desired darker blue. Cherry red, pink, salmon, champagne and peach are the rarest and most expensive Topaz.