|Derivation:||From "topazos" (Greek) a green gem or "tapaz" (Sanscrit) to glow|
|Description:||Transparent or translucent crystal, either yellow or blue|
Topaz is usually thought of as yellow. The first specimen is natural and the second polished (tumbled).
Here is a cut topaz.
However topaz can be blue. Here are two polished (tumbled) specimens, one opaque, one transparent.