Vibrational spectroscopy and solubility study of the mineral stringhamite CaCuSiO4·H2O

► Stringhamite CaCuSiO4·H2O is a hydrated calcium copper silicate. ► It is commonly known as a significant 'healing' mineral and is potentially a semi-precious jewel. ► Stringhamite is a neosilicate with Cu2+ in square planar coordination. ► Vibrational spectroscopy has been used to characterise the molecular structure of stringhamite.