it can refer to the jewelry makers initials or company initials. using those same intials GS usually means gold over silver when it is stamped inh the order of GS.
Solid Gold
Solid Gold
Its the initials of the gold or silversmith's who made the ring
SG = SoftgroundFG = Firmground
Solid Gold
swag swg sg
Platinum SG of 20
specific gravity
What does this mean in jewelry?
SG ur may represent specific gravity of urine, a typical measure taken during urinalysis.
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