MATERIALS: Made with white gold plated high polished 925 sterling silver and Created Blue Sapphire. Made to last a lifetime, strong and durable! All the metals we use are lead free, nickel free and hypoallergenic. BIRTHDAY BRACELET: Elegant created blue sapphire bracelet is known as the wisdom stone and will bring you peace and wellness of mind. This sparkling and colorful tennis-style bracelet is a great look any time. MEASUREMENTS: This Sapphire Tennis Bracelet width: 4mm. Chain length: 7.7"/1