silver filligree and ivory should I sell or keep?

by Dianne
(Anchorage)

I have an antique set - pendant, bracelet, earrings - that is made of very fine silver filligree (almost like quill work out of silver threads) with square insets that look like ivory with almost a scrimshaw type of design with butterfly and bird. I know the incredibly detailed silver work is valuable. How do I find out if it is worthwhile to keep in the family or sell?