Lab Created Blue Star Sapphire Crown Bezel Antique Silver Necklace. 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 necklace features an 8mm Lab created Blue Star Sapphire mounted in a Argentium Sterling Silver Gallery Bezel. The chain is a 1.3 mm Flat Oval Cable Chain of Rhodium Plated Sterling Silver for greater tarnish resistance. Includes polishing cloth. 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.