Translation guide
A dark, glassy volcanic rock. In Japanese, it is most commonly referred to as 黒曜石 (こくようせき).
Referring to the volcanic glass obsidian in geological, archaeological, or everyday contexts.
The standard term for obsidian. Used in science, archaeology, and when discussing the material itself.
This arrowhead is made of obsidian.
Obsidian is a type of volcanic glass.