Colourful mineral (5)
I believe the answer is:
agate
(Other definitions for agate that I've seen before include "Type of quartz" , "Striped stone" , "Semi-precious stone" , "Quartz variety" , "Banded ornamental stone" .)
I believe the answer is:
agate
(Other definitions for agate that I've seen before include "Type of quartz" , "Striped stone" , "Semi-precious stone" , "Quartz variety" , "Banded ornamental stone" .)