1.   He formulated glass with different melting points so he could layer colors, sprinkling powdered glass on top of a flower and fusing it with heat.

2.   Known on the streets as crank, speed, glass and crystal meth, the drug looks like anything from brown sugar to powdered glass.

3.   Shelves are stacked with jars containing powdered glass.

4.   The string is soaked in a mixture of powdered glass, pine resin, rice and water, creating an edge sharp enough to slash a human.