- any one of a team of silicate minerals which are a source of rare-earth metals.
- A silicate containing a large amount of cerium. Most commonly it is black in color, opaque, and it is related to epidote in form and structure.
- A silicate of cerium and allied metals with aluminum, metal, and calcium. It is isomorphous with epidote.
Sentence for "allanite"
- -- This is an emerald-green variety…
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