Chain link brooch with sterling and 14K gold links..
We called it bur set,push the graver point into the metal an lever the metal toward the stone over the edge of the stone.
You would need to define "gypsy set" for us,the ring setting doesn't match any definitions I know of.
It is definitely not a Peruzzi cut stone as they were "square" and not round. It looks like a poorly cut example of an old European cut stone.
Many were dated.............
Margot De Taxco.............
A soft toothbrush and baking soda paste.
The mark on the top piece doesn't look Japanese. @Any Jewelry
The metalwork does not suggest the age,this type of die stamped design was still being made in the 1980's.
A patent # only tells you when it was approved by the government. It does not tell you when the item was manufactured and used.I know of one...
After looking up what a fret saw is,a fret saw and a jeweler's saw frame are the same tool and just use different type of blades. But they are not...
Is the wire magnetic?
Is the black part magnetic? If not it could be one of these alloys.......... https://www.ganoksin.com/article/introduction-japanese-alloys/
It is a jeweler's saw frame........
There are over 500 minerals in Scotland,take a look..... https://www.mindat.org/loc-14091.html
The stamp appears to have been cast as part of the original piece,marking the wax before casting has about a 50-50 chance of being readable.
Give it a good washing and dry with a lint free cloth.Either it's dirty and dusty or it's full of air bubbles.New photo after washing would help.
There is a jeweler's saw frame and a hand held vice metal clamp,both used by jewelers and gun smiths.
The only thing I would call it is a mess.Bad casting and fabrication and looks like a number of poor repairs.
There is no niello on the OP's dagger or the one in the link.
Separate names with a comma.
