Gem bound all kinds of gem grade corundum beyond ruby are called sapphire. Sapphire mineral name for corundum, corundum group minerals.
Tourmaline has complex composition and color. The international jewelry industry is basically divided into commercial varieties according to the color of tourmaline, and the more colorful the color, the higher the value.
Pink Sapphire reddish sapphire: earlier, the international gem community believed that only corundum with medium depth to dark red or purplish red can be called ruby. Those that turn red light to very light are called pink sapphires.