Arsenic sulfide

Arsenic sulfide may refer to:
 * Arsenic trisulfide, As2S3, the mineral orpiment
 * Arsenic pentasulfide, As2S5, similar structure to phosphorus pentasulfide (β-P2S5)
 * Tetraarsenic tetrasulfide, As4S4 (2 isomers):
 * the mineral realgar
 * the mineral pararealgar
 * Tetraarsenic trisulfide, As4S3, the mineral α- or β- dimorphite