20-year-old Korakaki prevailed over Monika Karsch, a 33-year-old from Germany, who mounted a late but ultimately unsuccessful rally after Korakaki established a strong lead. The two are first-time Olympians.
Heidi Diethelm Gerber of Switzerland won the bronze medal, beating world no.1 and world champion Zhang Jingjing of China. The Swiss shooter is 47 and took up the sport at 33.
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Korakaki, dressed in Greece's blue and white colours, jumped up and down and embraced her coach after winning her second medal.
On Sunday, she won the bronze in the 10 metre air pistol and is now the only Greek athlete to have won medals in Rio so far.
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