Gemini I Twins I Sterling I Zodiac Pendant

This is an older (1990s), fixed bail, zodiac pendant of Twins (+ star) for the zodiac sign Gemini (late-May to mid-June birthdays). The stamp/hallmark in photo 3 reads "CCC STG" which, I *believe* may have been made by Guld Carlsén (Carlsen Gold) of Sundsvall, Sweden, but I can't confirm/be sure. It measures approximately .75"(W) x 1.25"(L including bail), shown in photos 4-5. An almost identical pendant is in my closet with a different back. *Chain in photos 6-7 is not included*