silver tone chain necklace with multi-tone geometric pendant

Silver tone chain necklace. Has a tiered pendant. Top tier is a gold tone circle over a silver tone square. Bottom tiere is a copper tone circle over gold tone and black metal squares of different sizes. No markings on pendant. Chain has some sort of mark by the clasp (it looks like it's BKG or 8KG). In good used condition. Chain is approximately 17.5" and pendant is just shy of 2"