Crossword Genius

Rock-forming mineral consisting of aluminium silicates that represents around 60 per cent of our planets crust (8)

Ross

I believe the answer is:

feldspar

(Other definitions for feldspar that I've seen before include "Raw material used in glass-making, ceramics etc - red flaps (anag)" , "Common mineral" , "Rock-forming mineral" , "Abundant mineral" , "Large wading bird" .)

I've seen this clue in The Mirror.
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