acids, inorganic; alkali; chemicals product, inorganic; distilled water; inorganic acids; inorganic bases; inorganic basic chemicals; inorganic compounds, inorganic combinings; pigments, under concentrated or fundamental form; precious stones, synthetic materials, artificial materials; quarz industrialist; salts, inorganic; stones, synthetic, reconstructed; sulphate; sulphur, sublimate, precipitated, colloid