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Hydraulic fracturing is a well stimulation technique in which rock is fractured by a pressurized liquid.

Proppant is a gritty material with uniformly sized particles that is mixed in with fracturing fluid during the hydraulic fracturing (fracking) process to hold open fractures made in the ground. Proppants come in a variety of different sizes and spherical shapes for a variety of different situations.

Proppants are natural or human-made solid materials, such as sand grains or ceramic materials. They are mixed with frac fluid and used to keep (or prop open) fractures during hydraulic fracturing (also known as fracking).

Today, the oil boom in North America would not be possible without hydraulic fracturing, which makes recovering oil and gas locked within rock formations economically viable. The hydraulic fracturing process has received tremendous publicity during the past few years, particularly highlighting poten