Asbestos is a mineral with six different types, including white, brown, and blue asbestos. All kinds of asbestos have millions of fibres and are commonly found in rock, soil, and sediment. It was a common building material up until the late 1980s because of its heat and corrosion resistance with good insulating properties. Plant machinery and equipment contained asbestos, as well, until 2003.
The naked eye cannot see asbestos fibres. They are very light, allowing the wind to carry them over to long distances. If your house was built before the mid-1980s, it highly likely contains asbestos. For homes constructed between the mid-1980s to 1990, there is a possibility, as well.