Valentina series now includes yellow lemon quartz color. Large, multifaceted cut stone. By matching as simple a ring as possible with no nails or bottom, You can feel the clarity of the stone. Product Name: JR027 SIZE: No. 9 to No. 16 Material: Hydro quartz, 925 silver and 18K gold plate SIZE: No. 9 * Hydroquartz: Synthetic quartz made by the hydrothermal method. The composition is the same as natural crystal. * Be careful not to immerse the stone in the water, as the stone will easily come off the pedestal.