Sulfur is an abundant, multivalent and nonmetallic chemical element. It is a bright yellow, crystalline solid at room temperature. Being abundantly available in native form, the element was known in ancient times and is referred to in the Torah (in the Book of Genesis). A natural form of sulfur known as shiliuhuang was known in China since the 6th century BC and found in Hanzhong. These sulfur crystals on a matrix, measuring 4.8 cm × 3.5 cm × 3 cm (1.9 in × 1.4 in × 1.2 in), was mined in Daniel Campos Province, Bolivia.Photograph credit: Ivar Leidus