Labels:crt screen | dialog box | hakham | monitor | sky | web site | window OCR: Physical properties of Quartz Temperature Effects: Quartz crystals undergo structural transformations when heated. Ordinary or low Quartz, when heated to 573 C (1063.4 F), is converted into high Quartz which has C different crystal structure and different physical properties. When cooled, high Quartz reverts tc low Quartz Between 870 and 1470 C (1598 and 2678 F}, Quartz exists in the form called tridymite Above 1470 (2678 F}, a stable form known as cristobalite created. At about 1710 (3078 F},the mineral melts. 29 underao wher Betweer 26789 forr knowr minergl
