On The Vampire Diaries, Damon Salvatore and Stefan Salvatore both wear lapis lazuli Salvatore Family Crest Rings which allow them (vampires) to walk in the daylight. This ring has semi-precious Lapis in a bezel setting, and sterling silver filigree on the ring band. The stone size is 25x18mm. The ring says, in Latin, “Pro Infinito.”
You can buy this Vampire Diaries ring from this link to Etsy.
And here’s a selection we had earlier for a ring that seemed like one a Salvatore would wear.
Or are you looking for Elena’s necklace from The Vampire Diaries?