Gemstone Disc Pendant With Brass Chain. Chain Has The Original Extender On It (As Pictured) So It Can Be Worn As 16" Or 24" Long. Adjustable Lobster Clasps. By Jan Micheals Of San Francisco. Jewelry Tag Pictured. Disc Itself Is Testing As Glass / Tourmaline On The Persidium Gem Tester Ii, Although I Cannot Identify The Stone Itself. Jan Micheals Does Use Gemstones In Her Jewelry. For Seller Only: G14