Brown Topaz is a variety of topaz found in Pakistan, near the town of Katlang in Mardan district. This mineral has a brownish or reddish-brown colour due to the presence of traces of chromium (Cr3+) in its chemical structure. Brown topaz is a gemstone that boosts self-confidence and removes doubts. It is said to be destined for those who distrust the Universe. Brown topaz is formed in calcite veins in a recrystallized limestone hill, along with other varieties of topaz, such as colourless, grey, yellow, green or pink. It is quite difficult to source, with only one known origin for such topaz.
According to accounts by the Roman naturalist Plinius, the mineral's name comes from the island "Topazos" in the Red Sea. In fact no topaz was found there, but olivine, with which it was confused. Another source of the name comes from a Sanskrit word tapas meaning 'fire'. In 1740 there was a topaz fixed in the Portuguese crown, it was named "Diamant de Braganza" and believed to be a diamond.