Answers. Best Answer: The .925 does mean sterling silver and the FB may be a Hallmark. You did not state what is on the medallion so I don't know where it was made. On some silver items the FB stands for Franz Bibus a Czech silversmith.
The core of Darwin's theory is natural selection, a process that occurs over successive generations and is defined as the differential reproduction of genotypes. Natural selection requires heritable variation in a given trait, and differential survival and reproduction associated with possession of that trait.
GCIDE(1.00 / 1 vote)Rate this definition: 1  Natural(a.) Hence: Not processed or refined; in the same statre as that existing in nature; as, natural wood; natural foods. 2  Natural(a.) Connected by the ties of consanguinity. especially, Related by birth rather than by adoption; as, one's natural mother.