The value of a topaz is largely determined by its quality. But color is also important: blue topaz, for instance, is often irradiated to deepen and improve its color.
黄水晶的价值很大程度上取决于其品质，但颜色也很重要。举例来说，蓝色的黄水晶常需放射处理以加深和改善其颜色。
Blue Topaz
原声例句
新东方优美短文背诵
英语百科
Topaz
![](/Images/godic/202501/01/TopazUSGOV2026.jpg")
![Facet cut topaz gemstones in various colors](/Images/godic/202501/01/Large_Topaz_Gemstones2026.jpg")
![Yellow topaz in stepped kite-shaped cut](/Images/godic/202501/01/YellowTopaz2026.jpeg")
![](/Images/godic/202501/01/TopazMountainByPhilKonstantin2026.jpg")
Topaz is a silicate mineral of aluminium and fluorine with the chemical formula Al2SiO4(F,OH)2. Topaz crystallizes in the orthorhombic system, and its crystals are mostly prismatic terminated by pyramidal and other faces.
- indicating meter
- indicating meter for x ray apparatus
- indicating method
- indicating metre
- indicating micrometer
- indicating micrometer calipers
- indicating micrometre
- indicating mixture
- indicating needle
- indicating on packaging materials prior to packaging
- indicating or controlling cooking TIME
- indicating organism for water pollution
- indicating oscillograph
- indicating panel
- indicating per cent
- indicating percent
- indicating pin
- indicating plant
- indicating plug gage
- indicating plug gauge
- indicating pointer
- indicating potentiometer
- indicating potentiometre
- indicating pressure
- indicating pressure gage