Gypsum variety
I believe the answer is:
alabaster
'gypsum variety' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for alabaster that I've seen before include "Translucent white gypsum as found carved into ornaments" , "Altar base (anag)" , "White stone carved into ornaments" , "White translucent form of gypsum used for statues, vases etc" , "White ornamental stone" .)