Definition of Rock butter

(Min.) native alum mixed with clay and oxide of iron, usually in soft masses of a yellowish white color, occuring in cavities and fissures in argillaceous slate.

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Roc
Rocaille
Rocambole
Roccellic
Roccellin
Roche
Roche alum
Roche moutonnee
Rochelime
Rochelle
Rochelle powders
Rochelle salt
Rochet
Roching cask
Rock
Rock alum
Rock barnacle
Rock bass
rock bird
Rock builder
Rock candy
Rock cavy
Rock cod
Rock cook
Rock cork
Rock crab
Rock cress
Rock crystal
Rock Day
rock doo
Rock dove
Rock drill
Rock duck
Rock eel
Rock goat
rock grouse
Rock hopper
Rock kangaroo
Rock lobster
Rock meal
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