pure raw block of sulphur with a powder-like texture. natural sulfur mineral specimen with celestine crystals on its surface

sulphur sulfur abstract array bladed crystals block bright yellow brimstone burning stone celestine chalcogen chemical element coarsely crystal lattice crystalline solid crystallization crystallographic dipyramids fertilizer fibrous forms gemstone geology irregular matrix microcrystals mineral combination mineralology minerals nonmetal ore orthorhombic oxygen group pale powdery surface prismatic pure raw resinous rough sulfates sulfide texture uneven unpolished volcanic