| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| The "creta" in Cretaceous comes from the Latin for this substance picked up by some blackboard erasers | chalk | $1,200 | DJ | GEOLOGY | 2003-09-15 | #4371 | |
| This soft variety of calcium carbonate created the white cliffs of Dover | chalk | $200 | DJ | ROCKS & MINERALS | 1994-05-25 | #2253 | |
| Famous deposits of this mineral can be found in western Kansas & Dover, England | chalk | $1,000 | DJ | ROCKS & MINERALS | 1993-03-04 | #1964 |