Asphalt is an over-mature product of complex hydrocarbon substances (hydrocarbons).

Organic matter in ancient times (at least millions of years) gradually formed light crude oil through a series of physical and chemical actions in buried sediments. We usually hear that the futures price of new york crude oil is $65 per barrel, which is the price of light and low sulfur crude oil.

After a long period of geological high temperature and high pressure, it becomes ordinary crude oil with higher density.

It will become heavy oil after a long time. Heavy oil usually moves at high temperature underground (especially when it is heavy), but when it is mined to the ground, it will become solid, that is, asphalt.

After an extremely long geological age, underground heavy oil may become natural gas.

Crystal is a single substance, while asphalt is a mixture! These components include the same components as gasoline and diesel.