| Date | Grid | Clue | Author | Editor |
|---|---|---|---|---|
| Fri Apr 2, 1993 | 25A | Flintlike rock | Eugene T. Maleska | Maleska |
| Tue Jul 7, 1987 | 28D | Quartz | Judson G. Trent | Maleska |
| Tue Sep 21, 1976 | 6D | Fine-grained rock | Marie West | Weng |
| Fri Aug 15, 1969 | 43A | Flint-like rock. | Unknown | Weng |
| Sat Feb 26, 1966 | 44D | Kind of quartz. | Arthur Schulman | Farrar |
| Wed Jan 9, 1963 | 1D | Dull-colored flintlike quartz. | Louise Earnest | Farrar |
| Sun Jun 17, 1962 | 87A | Flintlike quartz. | William A. Lewis Jr. | Farrar |
| Sun Oct 19, 1958 | 112A | Kind of quartz. | A. H. Drummond Jr. | Farrar |