idocrase
/ˈʌɪdə(ʊ)kreɪz
/ /ˈʌɪdə(ʊ)kreɪs/noun [mass 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)....
- In fact idocrase is one stone that is sometimes mistaken for jade by jewelers and consumers alike.
Origin
Early 19th century: from Greek eidos 'form' + krasis 'mixture'.
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