Trying to find out what it is was fun, because of the unusual markings, but I found something.
Not sure I can bring much to the table yet, but maybe it will help someone else.
Because items like this can be found on Etsy and similar places as "Byzantine era pendant" or elsewhere as "Native American folk art", it may be just a piece of jewellery someone just designed as a mashup of several items.
However, the items on the crest are interesting:
- Crown depicted most closely resembles St Edward's Crown, which was in use by kings of England and wales up until 1649, when it was either sold or melted.
- The cross in the middle is the stylized fur trade era fur trade silver cross, in style of master silversmith Robert Cruikshank of Montreal
- Fleur-de-Lys flanking the cross may reference Quebec (it's coat has 3 Fleur-de-lys symbols nowadays, but earlier it was just two).
So, if it's original, then it can be traced to Canada, more specifically Hudson Bay fur trade era, at the turn of the 1700s and 1800s. May be earlier, because at that time pendants like this were no longer in use in trade (fur traders of 1600s and early 1700s would gift them to native tribe leaders in the wampum tradition), instead rather quickly fur traders and indigenous people would switch to trade the actual silver pendants (crosses, badges, animal shapes etc). Mainly because of their value and portability, like this find shows.