In [[nature]], sulfur can be found as the pure element and as [[sulfide]] and [[sulfate]] minerals. Elemental sulfur crystals are commonly sought after by mineral collectors for their brightly colored [[polyhedron]] shapes. Being abundant in native form, sulfur was known in ancient times, mentioned for its uses in [[ancient Greece]], [[ancient China|China]] and [[ancient Egypt|Egypt]]. Sulfur fumes were used as fumigants, and sulfur-containing medicinal mixtures were used as balms and antiparasitics. Sulfur is referenced in the [[Bible]] as '''brimstone''' in [[English language|English]], with this name still used in several nonscientific terms.<ref name=Greenwd/> Sulfur was considered important enough to receive its own [[alchemical symbol]]. It was needed to make the best quality of [[gunpowder|black gunpowder]], and the bright yellow powder was hypothesized by alchemists to contain some of the properties of gold, which they sought to synthesize from it. In 1777, [[Antoine Lavoisier]] helped convince the scientific community that sulfur was a basic element, rather than a compound.