On Undercurrents (dakārgala) - Verse 110

Where stones are found of the colour of the moonlight or crystal or pearl or gold, or of the colour of Vermillion or collyrium, or of the colour of the rising sun. or of the colour of Haritāla , that is, sulphuret of arsenic, there would be prosperity. Thus have we stated the views of Manu on the subject of undercurrents.