Obsidian does not naturally occur in Alberta where the artifacts are being unearthed at Early Prehistoric archaeological ...

The victim, believed to be approximately 20 years old, was discovered in the Collegium Augustalium, a public building ... colored organic glass with the appearance of obsidian.

His body was first discovered in the 1960s inside a building called the College ... and shiny surfaces quite similar to ...

Pic: Reuters/Pier Paolo Petrone The man was first discovered in the 1960s inside a building called the ... shiny surfaces quite similar to obsidian, a natural glass of volcanic origin - black ...

The process is called vitrification. "Obsidian glass, that is, volcanic glass, forms when lava is very quickly cooled, for example, where it enters into water," Mr Giordano added. According to ...