2 uses
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Definition
a black or dark-colored volcanic glass; one of the finest raw materials for the chipping of stone tools
- Looming on the horizon was a palace of glittering black obsidian.Chapter 19 (14% in)
- We all collapsed, exhausted, on the obsidian gravel.Chapter 19 (27% in)
There are no more uses of "obsidian" in The Lightning Thief.
Typical Usage
(best examples)