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Willemite
WILLEMITE

Definition: Orthosilicate of zinc, white when pure but commonly red, brown, or green through the presence of manganese or iron-noteworthy as exhibiting an intense bright yellow fluorescence in ultraviolet light.
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See perfect orthosilicate.

See perfect specificity.
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See perfect commonness.

See perfect applicability.
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See perfect particularity (1).

See perfect characteristic (1).

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