crystal quartz

例句：

1. 1. This piece of quartz is the most valuable gemstone in the world.
   这块石英是世界上最珍贵的宝石。
2. 2.The crystal quartz in the aquarium is so clear that it almost looks like water.
   水族箱里的水晶石英晶莹剔透，几乎像水一样。
3. 3. Quartz is used in many different industries, including construction and electronics.
   石英被用于许多不同的行业，包括建筑和电子。