Citrine 348 kilograms 135x50cm, from mina Anahí in Bolivia.

Citrine, or lemon quartz, is the lemon-yellow translucent variety of the mineral quartz (SiO₂). Properties Like the other varieties of quartz, translucent citrine is a nesosilicate. Trace elements, including divalent and trivalent iron, contribute to the yellow colour. The crystal system of citrine is trigonal, and the hardness is 7. Name: Citrus is the source of the name citrine, owing to its yellow hue. Depending on the colour, the quartz variety was also called Madeira topaz, golden topaz or Bahía topaz in the past, completely incorrectly, because topaz is a entirely different mineral. This designation was probably done to suggest a higher value. Occurrence The most important sources of citrine are Brazil, Madagascar and the former Soviet Union. Amethyst is often burnt and sold as citrine. You can recognise this mineral by brown to black points. Citrine is more valuable than amethyst.