It is a cameo. Here is not a proper place to find a value for Probate. You need a letter/statement from a jeweler stating what it is and what the current value is. If you have one that actually deals in antiques rather than just current stuff they can also value it as an antique. You need that statement in writing which you may have to pay for but can use that payment as an expense to the estate.

I do have one similar to this but with a lighter shell with that same metal work around it. I would be interested in when that particular type of metal work was popular.

This looks like a beautifully carved shell cameo....with an unusual subject...usually they were women not scenes. The metal work appears to be gold plated and wearing....perhaps it had a pin back that is broken off. Your best place to figure value is sold items on ebay....and when asking about something....size is important.
My guestimate....considering it's not a brooch nor set in 14K gold....$25 to $50

You should take this to an accredited appraiser. Ebay or Amazon or anything similar will give you a very low-ball value! At the other end of the scale is 1st Dibs. I suspect it might be ivory, not shell.

bubbly why ivory? I see none of the grain that ivory would have.

A google search brought up this similar one, although not Asian themed:

The scene on the one in the OP is not oriental themed. The woman is wearing a dress from the 1700s.

wow - you all are my hero - thank you so much for this info!

BUT....theone pictures is set in 14K gold....which yours is not......and that is an asking price....not sold. check auction sites for sold prices.