Matt Hall
The "SN" stamp on jewelry typically stands for the metal purity, with SN representing 925 silver (92.5% pure silver). This stamp assures the buyer of the authenticity and quality of the metal used in the jewelry piece.
Sn is a shiny, silver-white metal. It exhibits a metallic luster and reflects light.
Morgan silver dollars were not minted until 1878.
SN = Tin and AG = Silver
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.
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.