Crossword puzzle clue "sparkly rock substance"

a rock-forming mineral (muscovite, biotite, lepidolite, etc.) with perfect basal cleavage

a roughly spherical stone, hollow or partially hollow, containing an accumulation of mineral matter

(German) a foliated usually coarse-grained metamorphic rock typically consisting of feldspar, quartz, and mica

gleaming

to adorn with jewels

(French) a trinket, a jewel