.999 Fine Silver Tourmaline Crystal Ring Size 7Material: . 999 Fine Silver (99. 9% Silver Content) Stone(s): Genuine tourmaline crystal Ring Face Dimension: 0. 8 x 0. 6 x 0. 2 inches Weight: 6. 9 grams Ring Size (US): 7 Stamp Mark: N A Serial Number: r25452 . 999 Fine Silver (99. 9% Silver Content); Stamp: N A; . 999 fine silver is whiter in appearance than . 925 sterling silver and tarnishes less. It does not trigger allergies in people sensitive to nickel or other alloys. Tourmaline is a coveted