European monks would take a piece of clear rock, often quartz, and place it on top of the reading material.
欧洲的僧侣们会拿一块透明的石头，通常是石英，放在阅读材料的上面。
2
The intense heat of the impact would produce heat-shocked quartz in many types of rock.
撞击所释放的强烈高温会在许多类型的岩石中形成一种热冲击石英。
3
There are gold, silver, iron, manganese, molybdenum, uranium, mica, vermiculite, quartzrock, feldspar, granite, marble, barite and mineral water, and so on.