Large semi-precious Green Cabochon Pendant Necklace

Large cabochon yellow-green stone pendant surrounded by a gold plated filigree design. The pendent is about 2 inches long by 1 1/2 inches wide, and flat on the back side. I think the stone is a polished calcite. It is marked Italy on the back of the pendent. There is a long 30-inch gold tone chain. There are some very minor scratches on the stone only seen with magnification. It feels completely smooth. N-213