Tropical Storm Clouds Sea Glass Necklace - One of my creations using an extremely rare color of sea glass. The flawless piece of gray sea glass has been wrapped with sterling silver wire and hangs on an 18' Venetian box-style sterling silver chain. Gray sea glass falls into the extremely rare color category. The chances of finding a piece of gray sea glass is approx once in every 2,000 pieces found. Finding an authentic piece as flawless as this is much harder. This piece has not been altered in any way. This is how the piece looked when it was plucked from the surf in Puerto Rico, naturally tumbled by the sea and sand.