| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| Here's the windup, & this ore of uranium in which that element was first discovered | pitchblende DD | $4,000 | DJ | SCIENCE FACT | 2022-02-18 | #16 | |
| The most important source of uranium & radium is this mineral ore | Pitchblende | $500 | J | SCIENCE | 1991-01-25 | #1480 | |
| Mineral that's the richest in uranium ore | pitchblende | $1,000 | DJ | SCIENCE | 1985-01-04 | #85 |