We have the 6-letter answer for the crossword clue “Rock-forming mineral,” which was last seen in the 7 Little Words puzzle from October 26, 2025. If you’ve been stuck on this clue, we’re here to help you finish your puzzle!
**7 Little Words Answer:** QUARTZ
**About Quartz:**
Quartz is a hard, glossy mineral consisting of silicon dioxide in crystal form. It is colorless glass made of almost pure silica and is present in most rocks, especially sandstone and granite. Interestingly, yellow sand is actually quartz with iron oxide impurities.
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### Definitions
**Quartz (noun):**
A hard, glossy mineral made of silicon dioxide crystals, commonly found in many rock types.
**Mineral (adjective):**
Composed of matter other than plant or animal.
**Mineral (noun):**
Solid, homogeneous inorganic substances occurring in nature with a definite chemical composition.
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