古代では, there was a difference between "ルビー" in people's mouth and modern ruby. その時, ruby was not ruby in the true sense, but refers to all red gems, ルベライトなどの, red spinel, そしてガーネット. , ルビー, 等, そして時間が経つにつれて, the modern meaning of ruby is corundum ruby. したがって, これ [...]
