| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| This common silica mineral is found in many types of rocks & is the most common constituent of sand | quartz | $1,600 | DJ | SCIENCE & NATURE | 2023-06-30 | #8905 | |
| Rock on! This, composed of silicon dioxide, is the most abundant mineral in the continental crust | quartz | $1,000 | J | THE NATURE OF THINGS | 2010-03-17 | #5878 | |
| Rock crystal is a colorless variety of this mineral, & amethyst is the purple variety | quartz | $500 | J | SCIENCE & NATURE | 1991-07-18 | #1604 |