Sapphire (Greek: σάπφειρος; sappheiros, ‘blue stone’, which probably referred instead at the time to lapis lazuli) is a gemstone variety of the mineral corundum, an aluminium oxide. Trace amounts of other elements such as iron, titanium, chromium, copper, or magnesium can give corundum blue, yellow, purple, orange, or a greenish color. Chromium impurities in corundum yield a pink or red tint, the latter being called a ruby. Commonly, sapphires are worn in jewelry.
Sapphire
![Sapphire blue stone on white surface](https://freeyorkk.b-cdn.net/wp-content/uploads/2021/02/agsddgrw2ps-758x568.jpg)