A sapphire is a precious gemstone composed of corundum, a crystalline form of aluminum oxide. It’s renowned for its vivid blue colour, though it can come in other colours like pink, yellow, green, and even colourless.
A sapphire is a precious gemstone composed of corundum, a crystalline form of aluminum oxide. It’s renowned for its vivid blue colour, though it can come in other colours like pink, yellow, green, and even colourless.