The Lemontina yellow color is a member of the Valentina series. Large, multi-faceted cut stone. By adjusting the ring as simple as possible, with no nails or bottoms, You can feel the transparency of the stone. Product Name: JR 027 Material: Hydro quartz, 925 silver to 18K gold plate SIZE: 9 * Hydro quartz ... Synthetic quartz made by the hydrothermal method (hydrothermal). The composition is the same as natural crystal. * Be careful not to put it on water, as it will make it easier for the stone to come off the pedestal.