Lapis lazuli, for one (3)
I believe the answer is:
gem
'lapis lazuli for one' is the definition.
(lapis lazuli is a kind of gem)
This is all the clue.
(Other definitions for gem that I've seen before include "Kindness; comfort (German)" , "Pleasant and cheerful (from German)" , "Valued person; jewel" , "perfect specimen" , "A precious stone like a diamond or emerald etc" .)