Stunning diamond bar necklace

Beautiful gold and authentic diamond bar necklace! Originally purchased from Stone and Strand. Chain measures 22 inches. Slight discoloration at hook closure and very top of gold bar, noted in photos and not noticeable when worn. I believe it’s 10k gold but it could very well be 12 or 14k, I cannot guarantee as I no longer have the receipt. I am not aware of whether or not it’s gold filled or solid gold but the necklaces sold on their website currently are all listed as solid gold. Extremely dainty and chic!