(n.) A form of silica or silicon dioxide (SiO2), occurring in hexagonal crystals, which are commonly colorless and transparent, but sometimes also yellow, brown, purple, green, and of other colors; also in cryptocrystalline massive forms varying in color and degree of transparency, being sometimes opaque.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). quartz. Retrieved September 21, 2026, from http://smartdefine.org/quartz/definitions/2051742 |
| Chicago | Webster's. 2011. "quartz" http://smartdefine.org/quartz/definitions/2051742 (accessed September 21, 2026). |
| Harvard | Webster's 2011, quartz, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/quartz/definitions/2051742>. |
| MLA | Webster's. "quartz" 27 May 2011. Web. 21 September 2026. <http://smartdefine.org/quartz/definitions/2051742> |