Lab Created Blue Star Sapphire and Cubic Zirconia Ring Fascinating Brilliance! This stone is reminiscent of the vintage “Lindy” synthetic Star Sapphire of the 50s thru 70s. The star effect, known as an “asterism”, is more defined in a lab-grown Sapphire. They are identical in chemical composition, brilliance, and physical appearance as their natural counterpart, however they have fewer flaws, are not mined from the ground, and are much less expensive. They are an extremely durable stone with a Mohs scale hardness or 9 (a Diamond is 10). This ring features a 6mm Prong mounted lab created Star Sapphire sided with 6 Signity Star Cubic Zirconia on a 2.5mm wide 925 Sterling Silver band. Polished to a bright finish. Polishing cloth and ring sizer included. Shipped in gift box. Please note that the star effect or "asterism" of a Star Sapphire, is not a fixed element. It is the result of direct light, artificial or natural. The brighter the light source, the brighter the star display. In low light or shaded settings the star will be less visible. All photos are taken with direct light.