What is the name for the natural, black volcanic glass that was used to make sharp points for spears? 🌋
Obsidian
What do you call a thin layer of a substance spread over a surface, like the glaze on a bead?
Coating
What are the unwanted substances in a material that made early glass colorful?
Impurities
What is the noun for the official act of canceling a law, such as the Excise Act in 1845? 📜
Repeal
What is the past tense verb for officially collecting a tax?
Levied
What do you call a person who establishes a company, like Michael Owens did?
Founder
