Could this piece of sea foam sea glass been a coke bottle? 
Thank you ocean, sand and time for polishing the dangerous shards of glass into yummy little gems like this one. Wear as a necklace or anoint a keychain and look kool. Or wear on one of my hand knotted colorful beaded necklaces.  I like to cut out windows, and decorate the backsides of my pendants. Not boring at all.
The pendant comes on a simple 18" sterling silver ball chain.  
All Made On Mars Items come packaged in super cute packaging gift ready.