Word Study
geocronite
CIDE DICTIONARY
geocronite, n. [Gr. ge`a, gh^, the earth + Kro`nos Saturn, the alchemistic name of lead: cf. G. geokronit.].
A lead-gray or grayish blue mineral with a metallic luster, consisting of sulphur, antimony, and lead, with a small proportion of arsenic. [1913 Webster]
For further exploring for "geocronite" in Webster Dictionary Online