Chalcopyrite, Pyrite, and natural gold are easy to misidentify, especially pyrite is also called "Fool's Gold". The method to identify them is as follows:

1. The substantial difference between the three. 1. The essence of chalcopyrite: copper-iron sulfide minerals. 2. The essence of pyrite: iron disulfide. 3. The essence of natural gold: a naturally occurring gold element mineral.

2. The physical properties of the three are different. 1. The physical properties of chalcopyrite: there are often blue, purple-brown mottled actinides on the surface. Green black stripes metallic luster, opaque, conductive, hardness 3~4, brittle. The relative density is 4.1~4.3. 2. The physical properties of pyrite: light brassy yellow, and the surface always has yellow-brown actinium color. Green-black or brown-black streaks. Strong metallic luster and opaque; split, extremely incomplete. The hardness is between 6 and 6.5. The relative density is between 4.9 and 5.2. With detection. Pyrite is a semiconductor mineral. 3. The physical properties of natural gold: the color and texture are from golden yellow to light yellow, and it becomes thinner with the increase of silver content, metallic luster and opaque. Mohs hardness of 2.5~3, no splitting. The proportion is 15.6~19.3.

3. The three uses are different: 1. The use of chalcopyrite: In industry, chalcopyrite is the main raw material for copper refining. In the field of gemology, it is rarely used alone and occasionally used as a substitute for pyrite. In addition, it often participates in the composition of colored stones, gangue and jade. 2. Purpose of pyrite: the main mineral raw material for the manufacture of sulfuric acid. When Au, Co, and Ni are contained, accompanying elements can be extracted. Pyrite is also a very cheap ancient gem. In addition to polishing gems, you can also make bases for gems, jade, and other crafts. 3. Uses of natural gold ore: Gold has high electrical conductivity, thermal conductivity, good ductility and stability, so it is widely used in the electronics industry.

   The above is the introduction to the difference between chalcopyrite, pyrite and natural gold, thanks for reading.