名词黄玉，黄宝石

1. 黄晶;黄玉
A topaz is a precious stone which is usually yellowish-brown in colour.

noun

1. a light brown the color of topaz

Synonym: tan

2. a mineral (fluosilicate of aluminum) that occurs in crystals of various colors and is used as a gemstone

3. a yellow quartz

Synonym: false topazcommon topaz