Selling depends on where you live,I believe there is only 12 states which ban ivory sales........
I don't see any letters,it was sanded on a circular rotating disc.If letters were to be applied it would be after sanding the surface.
Looks like a sash,almost anyone can make them.
Looks like a Korobase bird mask missing part of it's bill. https://nohmask21.com/eu/korobase.html
The design on the fork handles was made by a flat graver(wriggle engraving) and possibly a round graver.
Pipe rest..... https://www.worthpoint.com/worthopedia/vintage-classy-sterling-silver-english-pipe-rest
Need a better photo of the nugget on the left,looks like it may have casting bubbles.
They are single cut,only 18 facets.
Bidri Ware is copper and zinc alloy,the Japanese Zogan inlay uses iron.
In the USA PT usually stands for platinum,but the OP's ring is marked ct. for carat/karat which is usually a UK mark.The PT could be a maker's mark.
The mark in the link is 18ct and PT.The ring you posted has had a 3/4 shank replacement and has been sized.The mark could have been from scrap out...
Google onyx......
Mexican onyx is travertine,not agate.
Onyx is black agate,you might have travertine.
Looks like Toledoware/faux Damascene.
Made in Mexico
It's hand engraved and there appears to be 3 marks inside back side rim.
There is no tool to test the "sharpness" of facets.The sharpness is determined by the ability of the gem cutter on any type of gemstone.
But do you know what you have? The large stone looks like Chrysocolla with Malachite or possibly low grade Eilat stone,not turquoise. The...
yes.... https://gldn.com/blogs/journal/gold-filled-vc-gold-plated-jewelry
Separate names with a comma.
