looks o.k. to me Keith, pontil depression look about right - and I'm assuming it's Jade, although the book picture of Jade seems a little darker. Alabaster seem to have had more than its fair share of dinky examples - perhaps they thought small was beautiful. The book says that this colour ceased in 1938, and from memory believe it also says there are lots of examples still around............. wsell, if they are they're not round my way.
Not an easy material to photograph - hope you don't mind me attaching pic of small Jade coloured bowl I found this morning - only the second piece I've seen (bowl is 5" (130mm) in diameter - I may well be missing a lid, as with my blue Alabaster bowl.