고대에는, there was a difference between "루비" in people's mouth and modern ruby. 그때에, ruby was not ruby in the true sense, but refers to all red gems, 루벨라이트와 같은, 레드 스피넬, 그리고 가넷. , 루비, 등., and over time, the modern meaning of ruby is corundum ruby. 그러므로, 이것 [...]
