Vào thời cổ đại, there was a difference between “Ruby” in people’s mouth and modern ruby. At that time, ruby was not ruby in the true sense, but refers to all red gems, such as rubellite, red spinel, and garnet. , Hồng ngọc, vân vân., and over time, the modern meaning of ruby is corundum ruby. Vì thế, cái này […]
