Original Star K Square Cut 7mm Created Sapphire Earrings. This alluring Original Star Kâ„¢ Square Cut 7mm Created Sapphire Earrings, crafted in .925 Sterling Silver. This beautiful design is mounted with 2 stones prong set blue Square Created Sapphire. This style measures 7.00 mm wide, 7.00 mm long. Buy this Original Star K Square Cut 7mm Created Sapphire Earrings Now $31.99.