Only 1 Shortz Era entry found. Click the date to see the answer in context. See the dictionary definition.
|Saturday, March 15, 1997||55A||Relative of perlite||Daniel R. Stark|
2 results for OBSIDIAN from Variety puzzles.
|May 24, 2009||acrostic||K||Dark material formed by the cooling of molten lava||Emily Cox and Henry Rathvon|
|October 17, 2004||acrostic||K||Volcanic glass, once used by Indians to make arrowheads and knives||Emily Cox and Henry Rathvon|
1 result for OBSIDIAN from older pre-Shortz puzzles.
|Friday, July 15, 1955||37D||Glassy volcanic rock.||Unknown||Farrar|