The mineral composition of some variable in the group of silicates. This is not a quartz and has nothing in common with citrine quartz, a much less valuable stone. Topaz can be yellow green, gold, pink, blue, green, purple or red light does not reflect a large extent so that the larger the stone, the better. It is widely used in the manufacture of jewelry and often imitated by citrine quartz.
It comes from Brazil, where it is as widespread as amethyst, Australia, Madagascar, USA, Mexico and Ceylon.