1. shaped like an egg.   Hint First letter clue   2. inert or at rest.   First letter clue   3. allowing light to pass freely; clearly apparent.   First letter clue   4. pertaining to extracting and processing metals.   First letter clue   5. small enough or unimportant as to be neglected.   First letter clue   6. evaporating rapidly or highly explosive.   First letter clue   7. iridescent or displaying rainbow-like colors.   First letter clue