14K Gold And 925 Silver Two Tone Modernist Brutalist Necklace, Natural Amethyst

A very unique artist's work of art vintage handmade necklace. Modernist / Brutalist. With natural purple / lilac / lavender amethyst stone. Two tone metal - real solid 14 karat gold curved prongs on the stone, 925 sterling silver clasp, and secure stainless steel wires holding a silver tone pendant. 16.5" around the neck. The pendant is not stamped, so not sure if it is made of solid sterling silver, or some kind of metal alloy.