EVER FAITH 925 Sterling Silver Blue Sapphire Color 3 Carat Radiant Cut CZ Engagement Ring [!]EVER FAITH is a US registered trademark and Ever Faith Jewelry is its only owner. We have SGS Professional Certification for our Sterling Silver Items. Customers could go to a professional agency for testing them. 925 Sterling Silver is also suitable for sensitive skin to wear. The big cubic zirconias are pronged to the jewelry item to secure from loosing. A prong setting is one component of what is known in the jewelry business as a head, a claw-shaped type of binding (typically 3, 4, or 6 individual prongs per head) that is welded or soldered to a jewelry item in order to mount (or set) a stone to the jewelry item. Length: 1.5cm(0.6"). Weight: 5g. WRAPPING: A Silver Polishing Cloth X A Gift Box X A Favor Bag. If you need assistance please contact us.