1, the chemical composition is different. Fluorite is a common halide mineral, and its main chemical composition is calcium fluoride (CaF2). Crystal is a colorless and transparent large-scale timely crystal mineral, and its main chemical composition is silicon dioxide (SiO2).

2. Different physical properties. The hardness of fluorite is 4 on the Mohs hardness scale, and its density is small. Some samples can emit light under friction, heating and ultraviolet radiation. The hardness of the crystal is 7, the density is 2.66g/cm3, and the refractive index is 1.544- 1.533, which is piezoelectric.

3. The appearance is different. Fluorite is usually brighter than crystal, and there will be some streamline on the surface, which has a certain luster. The color of crystal tends to be white or transparent, and the surface is very smooth, generally there will be no streamline. In addition, fluorite has fluorescent properties, which can emit green or yellow fluorescence under ultraviolet irradiation, but crystal does not have this property.

4. Different uses. Fluorite is widely used in industry, for example, as the main source of fluorine, fluorine element and its various compounds are extracted and prepared. In addition, its specimens can also be used for collecting, decorating and carving handicrafts. Crystal is often used to make jewelry, and its high transparency and perfect crystal form make it occupy a place in the jewelry industry.