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Blue Ensign
blue-eyed boy
blue-eyed Mary
blue-eyed soul
blue flag
blue fox
blue funk
blue-green algae
blue ground
blue grouse
blue gum
blue heaven
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blue ground

blue ground


noun 
Definition:
 
unweathered kimberlite rock: unweathered kimberlite rock lying beneath an oxidized yellow surface layer. Kimberlites occur in volcanic pipes and are the main source of diamonds.

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