topaz

(tōˈpăzˌ)

1. a. A colorless, blue, yellow, brown, or pink aluminum silicate mineral, often found in association with granitic rocks and valued as a gemstone, especially in the brown and pink varieties.
   b. Any of various yellow gemstones, especially a yellow variety of sapphire or corundum.
2. A light yellow variety of quartz.
3. Either of two South American hummingbirds (Topaza pyra or T. pella) having colorful plumage.