Yellow Topaz Heart

Topaz is a silicate mineral of aluminium and fluorine with the chemical formula Al2SiO4(F,OH)2. It is used as a gemstone in jewelry and other adornments. Common topaz in its natural state is colorless, though trace element impurities can make it pale blue or golden brown to yellow orange.

Topaz usually forms along fractures and in cavities of igneous rocks like rhyolite, granite or pegmatite. The crystals grow in the late stages of a magma cooling, when there is enough fluorine to enable the formation of topaz.