Thank you for viewing. I believe the purchase certificate was not originally included. I purchased it from noble. It is an onyx 18k gold-plated necklace. It has been used, and there are small scratches if you look closely, but it is still beautiful. The length can be adjusted slightly. Great for layering or wearing alone. I will hand it over in the special bag that came with the purchase, as shown in the image. P.S. The model in the image is photographing the pendant on her back, but of course, it can be worn in the normal way.