There are three main forms of cannabis:

Marijuana is the most common and least potent form of cannabis. It is the dried leaves and flowers of the plant. Marijuana looks like chopped grass, and ranges in colour from grey-green to greenish-brown. Marijuana is smoked in hand-rolled cigarettes (joints) or in a pipe (a bong).

Hashish (hash) is dried cannabis resin which comes in small blocks. The blocks range in colour from light brown to nearly black. Hashish is more potent than marijuana, producing stronger effects. Hash is added to tobacco and smoked, or baked and eaten in foods such as "hash cookies".

Hash oil is a thick, oily liquid, golden-brown to black, that can be extracted from hashish. It is usually spread on the tip or paper of cigarettes and then smoked. Hash oil is more powerful than the other forms of cannabis. This form is rarely found in Australia.