HCT is the maker of the jewelry
Platinum
Company name.
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"S26" is likely a marking that indicates the type of material used in the jewelry piece, such as sterling silver with a purity of 92.5%. It is a common marking on jewelry to signify the composition of the metal used.
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375 is the marking for 9 carat gold. Usually vintage European will have this marking.
The marking "SAL" on jewelry typically stands for "Sterling A.L." which indicates that the piece is made of sterling silver. Sterling silver is an alloy containing 92.5% silver and 7.5% of other metals, usually copper. This marking is a guarantee of the quality and purity of the silver used in the jewelry piece.
VCLM jewelry is vintage pieces of costume jewelry with a specific marking of "VCLM." They are created by the vintage jewelry company VCLM.
The 833 marking on gold signifies that it is 833 parts pure out of 1000. Translated to karats this would be 20kt, a popular purity used in Portuguese jewelry.
The jewelry marking "GQ14K" indicates that the piece is made of 14-karat gold, which contains 58.3% pure gold mixed with other metals for durability. The "GQ" prefix may signify the manufacturer's or designer's initials or brand name. This marking helps identify the quality and authenticity of the gold content in the jewelry.
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