noun

• A mineral consisting of a silicate of calcium, magnesium, and aluminium, occurring typically as dark-green to brown prisms in metamorphosed limestone.

  ‘In 1960 we had idocrase, whereas the change in nomenclature preference is reflected in the 1996 edition as vesuvianite (idocrase).’

  More example sentences

  • ‘In fact idocrase is one stone that is sometimes mistaken for jade by jewelers and consumers alike.’