The "rj7" stamped on a ring typically indicates the manufacturer's logo or brand, along with a size or model number. In jewelry, stamps can denote the type of metal used, such as gold or silver, and may also signify specific design elements or collections. To get precise information about the meaning of "rj7," it may be helpful to research the specific brand or consult a jeweler familiar with the mark.
impossible to answer without knowing who made it.
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