Natural Citrine Quartz Crystal Tower high quality with phantom

Natural citrine is formed by the gradual heating of amethyst, another variety of quartz, under high temperatures in the Earth's crust. This process causes the iron impurities within the amethyst to change color from purple to yellow, resulting in the creation of natural citrine. Here are some geological facts about citrine: Composition: Citrine is a transparent variety of the mineral quartz, which is made of silicon dioxide (SiO2). Citrine's color comes from traces of iron oxide suspended in a colloid. It can range in color from pale yellow to bright amber to smokey brown. Citrine has a hexagonal crystal structure. Hardness: Citrine has a hardness of 7. Density: Citrine has a density of 2.6–2.7. Refractive index: Citrine has a refractive index of 1.544–1.553. Citrine is found in many countries, including Brazil, Madagascar, Bolivia, and Russia. The majority of citrine on the market is heat-treated amethyst or smoky quartz.