Dimensions: 100 x 155 x 90 mm (LxWxH) Crystal shape: orthorhombic Hardness: 3-3.5 (Mohs scale)Classification: VI/A.9-10 Chemical composition: Strontium sulphate (SrSO4)Dimensions: 100 x 155 x 90 mm (LxlxH) Forme du cristal: orthorhombique Dureté: 3-3,5 (Échelle de Mohs)Classification: VI/A.9-10 Composition chimique: sulfate de strontium (SrSO4)