Gray Sea Glass Necklace - An extremely rare piece of authentic, flawless sea glass is wrapped with sterling silver wire and hangs on a Venetian box style sterling silver chain. Gray sea glass falls into the extremely rare color category of sea glass. It's estimated that finding a piece of gray happens 1 time for every 2,5000 pieces found. Finding a gray in 'jewelry quality' condition makes this piece even rarer. This piece is almost pastel like in color...and the nicest piece of gray I have ever seen.