• Quenching - a method used in jewelry making to quickly reduce the temperature of heated metal by submerging it in a liquid.

  • Quartz - a crystalline form of silica.

  • Quartz Glass - a fused amorphous quartz.

  • Quartzite - a rock consisting of a granular interlocking mass of quartz crystals (when small crystals of mica are present it forms aventurine quartz).

  • Quartz Topaz - a misleading name for the citrine variety of quartz.