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4 total results for OBSIDIAN ( score: 50 )
1 result for OBSIDIAN from Shortz Era puzzles:
2 results for OBSIDIAN from Variety puzzles:
|May 24, 2009||Acrostic||K||Dark material formed by the cooling of molten lava||Emily Cox & Henry Rathvon
|Oct 17, 2004||Acrostic||K||Volcanic glass, once used by Indians to make arrowheads and knives||Emily Cox & Henry Rathvon
1 result for OBSIDIAN from pre-Shortz puzzles: