A large yellow croaker gold bar 3 12.5g In the Republic of China, the gold bar in Liang Shi was "large yellow croaker", so a large yellow croaker gold bar was 312.5g. The investment varieties in the gold market are mainly divided into physical gold investment and gold investment derivatives derived from physical gold. Derivatives mainly include gold futures and gold options, and physical gold investment mainly includes gold bars, coins and gold ornaments.