He took the lid off and showed me a dark brown powder.

It is a fine black or dark brown powder.

Some say the brown powder is the deadly stuff.

It can also be a grey or brown powder.

He dipped a finger into the pile of brown powder.

Each appeared to hold two to three pounds of brown powder.

I take a risk, pouring the boiling water and brown powder into one of the plastic cups instead.

It typically appears as a light brown powder, easily soluble in water.

It has the form of an orange or brown powder.

So, the floor in the living room was covered with a rather thick layer of very fine brown powder.