FrancophonIA/Vikidia-EnFr huggingface dataset:
A ruby is  a kind of precious stone. It is often associated with emerald, sapphire and topaz.[1] It is usually red, but can sometimes be other colors.[1] It is formed of aluminum and oxygen (Al2O3)[1], and that means it's a kind of corundum. A small amount of chromium makes the color.