Fine silver (.999) is 99.9 percent pure silver (basically not
alloyed) and is generally considered too soft to use for jewelry
(except as bezel wire).
I used it in one of my first pieces. I made a ring for my son (which
he has now grown out of. they grow so fast), he says he will keep it
for his son.
It's rather crude, but it is constructed of 90/10 bronze bands, fine
silver sheet (protected by the bronze bands), and has a bronze and
fine silver mokume gane plate.
After the fact I learned a lot more about precious metals, and
possibly wont do anything like it in the future ;-)
Kindest regards Charles A.