| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| Of the 3 types of rock, most of the earth's crust is made of this one | igneous | $400 | J | GEOLOGY | 1995-10-04 | #2548 | |
| Of the 3 main groups of rocks, this one is formed directly from magma | igneous | $600 | DJ | GEOLOGY | 1993-03-19 | #1975 | |
| Pumice & obsidian belong to this major rock group not The Rolling Stones | igneous | $500 | J | ROCKS & MINERALS | 1992-05-06 | #1783 |