| 姓名： 螢石 | Name: Fluorite |
| 化學式： CaF2 | Chemical formula: CaF2 |
| 莫氏硬度標度： 4 | mohs scale of hardness:4 |
| 描述：螢石（也稱為螢石）是氟化鈣CaF2的礦物形式。它屬於鹵化物礦物。儘管八面體和更複雜的等距形式並不少見，但它以等軸立方的習慣結晶。 | Description: Fluorite (also called fluorspar) is the mineral form of calcium fluoride, CaF2. It belongs to the halide minerals. It crystallizes in isometric cubic habit, although octahedral and more complex isometric forms are not uncommon. |
| 挑戰：螢石遍布中國，南非，蒙古，法國，俄羅斯和北美洲中部。在這裡，值得注意的礦床分佈在美國的墨西哥，伊利諾伊州，密蘇里州，肯塔基州和科羅拉多州。 | Challenge: Fluorite is found worldwide in China, South Africa, Mongolia, France, Russia, and the central North America. Here, noteworthy deposits occur in Mexico, Illinois, Missouri, Kentucky and Colorado in the United States. |