Sapphire is a beautiful and precious gemstone that most people associate with its deep blue color. However, sapphires can come in a variety of colors, and there are many synonyms for this gemstone depending on its hue. For example, a yellow sapphire is often called a "yellow star sapphire," while a pink sapphire is often referred to as a "pink star corundum." Additionally, a green sapphire is known as a "green corundum," while a black sapphire is often called a "black star sapphire." Other synonyms for sapphire include "kashmir sapphire" and "royal blue sapphire." Regardless of its color or name, a sapphire is always an exquisite and valuable gemstone.