If a piece of jewerly bears the SN mark stamp one is reading it upside down. The mark stamp actually says NS. NS means that the jewelery is made from gold, silver and nickel, where nickel and silver are the base metal.
Morgan silver dollars were not minted until 1878.
SN = Tin and AG = Silver
a part of the sn
Part of the sn.
I think it's probably NS rather than SN (it can be read upside down or right way up!) It signifies it is a rolled gold necklace (ie a form of gold plated necklace) with the base metal being a mix of Nickel and Silver.
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Between 8 and 12 micron
"SN" usually means "Side Note". "ASN" usually means "Another Side Note".
It can be part of the sn, it can mean experimental, it can mean duplicate.
The "Sn" used for tin comes from its Latin name like many other elements. It is an abbreviation of the Latin name "Stannum."
It is for Substitution Nucleophilic reaction in organic molecules.