Lightweight necklace, made of Eloxal aluminum, which stands for electrolytic oxidation of aluminum. Eloxal is a German manufactured aluminum which is an incredibly lightweight aluminum alloy that will not tarnish.
Eloxal jewelry ("electrolytic oxidation of aluminum") was made mostly from the 1950s to 1960s and made in West Germany." The material is extremely lightweight and does not tarnish. The necklace is 40cm.