pyrognostic
/ˌpʌɪrə(ʊ)ɡˈnɒstɪk/Mineralogy. Now rare
adjective
Designating the characteristics of a mineral that are exhibited when it is heated under experimental conditions; of or relating to the investigation of such characteristics.
Origin
Mid 19th century; earliest use found in James Dana (1813–1895), geologist, zoologist, and teacher. From pyro- + gnostic, after diagnostic, geognostic, etc.