A type of metamorphic or crystalline rock having a granular, spherical, or ball-like crystal structure.
From 'grano-' (grain) + 'spherite' (from Greek sphaira, sphere, + '-ite' for minerals or rocks). A rare or specialized geological term from the mid-to-late 1800s for rocks with distinctive spherical grain patterns.
Granospherite is an even more obscure rock name than granomerite—it almost certainly appears in only a handful of 19th-century geological papers and has been essentially forgotten by modern geology, which is a reminder that not all specialized vocabulary survives.
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