These handmade earrings feature lab created Star Sapphires mounted in a 925 Sterling Silver Gallery Crown bezel. Chose 8 or 10mm diameter in Polished or Vintage Silver finish. Polished finish includes polishing cloth. The posts are heavy duty and slightly longer than standard (.036/19 ga. x 7/16"L). Two types of 925 Sterling backs are included for preference or just to have a backup pair (Rubber core bullet style and traditional friction catch). 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). 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. Shipped in gift box Visit the Salish Sea Inspirations Store from the link at top to learn more and view all my offerings. These handmade earrings feature lab created Star Sapphires mounted in a 925 Sterling Silver Gallery Crown bezel. Chose 8 or 10mm diameter in Polished or Vintage Silver finish. Polished finish includes polishing cloth. The posts are heavy duty and slightly longer than standard (.036/19 ga. x 7/16"L). Two types of 925 Sterling backs are included for preference or just to have a backup pair (Rubber core bullet style and traditional friction catch).