As an adjective pyritic
is of, relating to, or consisting of pyrite or pyrites.
As a noun kratochvilite is
a rare organic mineral, an orthorhombic hydrocarbon formed by combustion of coal or pyritic black shale deposits.
pyritic
English
Adjective
(-)
of, relating to, or consisting of pyrite or pyrites
kratochvilite
English
Noun
(
en noun)
(mineralogy) A rare organic mineral, an orthorhombic hydrocarbon formed by combustion of coal or pyritic black shale deposits.