1. A mineral (fluosilicate of aluminium) that occurs in crystals of various colours and is used as a gemstone
   "She wore a necklace featuring a brilliant blue topaz"
    
2. A yellow quartz
   "The jeweller explained that the necklace contained false topaz, not the more valuable true topaz";
   - false topaz, common topaz
    
3. A light brown the colour of topaz
   "The leather sofa came in a warm topaz shade";
   - tan

Derived forms: topazes

Type of: light brown, mineral, quartz, transparent gem

Encyclopedia: Topaz, Missouri