topaz
n.n. a type of hard, clear stone that is often used to make jewelry. It can be found in many colors, like blue, pink, or yellow.
n. a silicate mineral of the aluminium group, typically occurring in hexagonal crystals and used as a gemstone. Often associated with the color blue, though it can occur in various hues depending on impurities.
She wore a beautiful blue topaz necklace to the party.
The jeweler identified the stone as a topaz and explained that it was much harder than a ruby.
While diamonds are the hardest known natural substance, topaz is still a popular choice for engagement rings due to its clarity and vibrant color options.
From Old French topace (compare French topaze), from Ancient Greek τόπαζος (tópazos).
Various theories. Hobson-Jobson mentions as possibilities a corruption of Persian (from Turkish) top-chi, "gunner", or a connection with topee, from the hats they wore.