| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| A gem, or for that matter, a romance or an activity can "lose its" this, the way a mineral reflects light | luster | $800 | J | MINERALOGY | 2025-05-12 | #9331 | |
| Specific term for quality of light reflected by a mineral; a diamond might have a brilliant one | luster | $500 | J | ROCKS & MINERALS | 1987-10-08 | #709 |