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Related to demantoid: andradite
A transparent, green variety of garnet used as a gem.
[German, from archaic Demant, diamond, from Middle High German diemant, from Old French diamant; see diamond.]
(Minerals) a bright green variety of andradite garnet
[C19: from German, from obsolete Demant diamond, from Old French diamant + -oid]
a brilliant green andradite garnet, used as a gem.