Two separate horns,someone made the original horn longer/larger by adding the bottom portion of another horn.
It looks like a Ainu Kuma Bear from Hokkaido Japan.
There is no reason to believe the brooch is unique.It appears to be die stamped and possibly a hundred or more made.
The inside is suffering from a bad case of acid corrosion.Someone didn't clean the inside after the solder repair or left a corrosive in it.It is...
Olympic gold metals have been made of sterling since 1912.
Looks like an inexpensive piece of costume jewelry.White stones too small for the setting,beads too far out to even hold a right size stone.Main...
The stones may be prasiolite.
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