Crossword Genius

Sparkly collectible (5)

Ross

I believe the answer is:

geode

'sparkly collectible' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for geode that I've seen before include "Crystal-lined cavity in rock" , "Druse" , "Small rock cavity" .)

I've seen this clue in The New York Times.
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