Gold over sterling & colored CZ pendant

Floating pendant of gold over sterling silver with multicolored and clear cubic zirconia stones. I counted 85 stones in at least 4 different sizes. It's just stunning! It has such a lively sparkle and lovely soft colors. Signed DEL on the back. I can't figure how who DEL stands for. Measures 1.5" x 1.25". Excellent condition. I can find absolutely no flaws on this piece. Comes from smoke-free fragrance-free home. Questions and offers always welcome.