Okay, I did some digging around with the dragon bracelet. It is like others mentioned, but finding it... it's about impossible, unless someone else possess similar. However I found something, and apologise for lack of links! But I am giving you the keywords with what others can look for around.
If you try to find abalone inlay dragon jewellery, vintage or current, you can get pretty much a lot of chinese made, often very intrigate designs bangles and so. Thus I decided to go further and decided to look for abalone inlay vintage jewellery, during 1940s to 1980s. This opened a new territory, and possible more plausible location, from where it might have come from.
So first of all, this type of jewellery has been popular and I guess still is? I might be a she, but my knowledge of what's popular is bit off. Also being European do not help that much either. Anyway, back to the subject at hand. I noticed an abundance of handmade jewellery on this section, and it lead me to Mexico. I admit, that I am not that acknowledged about how popular going to Mexico was around 1960 to 1989. But lots of style imitating the dragon bangle shown (often made of brass and silver.) can be found. So could it be plausible, that she visited in Mexico and bought the bangle - or someone else did buy it for her? or it was brought as a souvenir perhaps?
But this is thing, which I am aware of (plus after reading multiple missing persons pages), but it seems fantasy creatures (suchs as unicorns) seemed to be really popular among young adults in jewellery and otherwise. Also the "New Age" kind of life was really in. So could this explain at least plausible origin of one of her jewellery?
Any thoughts?