Is it slag? How to tell the difference between obsidian and slag glass.

Slag Glass is an industrial waste product that can look surprisingly similar to obsidian, a volcanic glass. Without knowing important and often minor differences they can be easily mistaken for one another. On this episode of Rock Talk we discuss how slag and obsidian are similar, how they are different and how YOU can tell the difference when out rock hunting!

Видео Is it slag? How to tell the difference between obsidian and slag glass. канала Rock Talk