Beautiful Silver Freeform Brutalist Pendant with Chain

This unique necklace features a freeform "brutalist" style pendant adorned with a green stone (jade or agate?), and a beautiful twisted link chain. The pendant was likely made in Germany circa 1960s, and is stamped as 800 silver, while the chain is of a similar era made in Italy and stamped 925 silver. Both in excellent condition. Chain is 18"L, pendant is 2.5"L x 1 7/8, $95