- Mineral or compound that resists action of heat and
Source: Leet, L. Don. 1982.
Physical Geology, 6th Edition. Englewood Cliffs, NJ: Prentice-Hall
- a. Said of an ore from which it is difficult or expensive to recover its
valuable constituents. AGI
b. Exceptionally resistant to heat. AGI
c. A nonmetallic material suitable for use in high-temperature
Dictionary of Mining, Mineral, and Related Terms