A G5 marking on gold typically indicates that the piece is made of 22-karat gold, which is about 91.67% pure gold. The "G" often stands for "gold," while the "5" signifies the amount of alloy mixed with the gold, which is 2 out of 24 parts (or 1/12). This marking is used to denote the quality and purity of the gold jewelry or item. Always verify with a reliable source or jeweler for accurate identification.
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