Topaz is a crystal classified as a fine stone. The Egyptians claimed that it was coloured by the rays of Ra the Sun God.
Topaz is found in varying quantities worldwide. But the biggest source is located in Brazil in the State of Minas Gerais. It is also mined in the Pala region of California and in the Rocky Mountains. In the alluvia of Sri Lanka, Madagascar or Myanmar, it is mixed with other gems such as sapphire and ruby.
One of these best-known stones is set in the crown of Portugal. Another important specimen is part of the Dresden treasure in Germany. The Smithsonian Institution, the New York Natural History Museum and the British Museum also have important specimens, both rough and cut.