There are many Jade trees growing outside at my place and I have a few in pots This time of year, they all start flowering, except my Crassula gollum. In the 7 or 8 years I have had it, it hasn't ever flowered.
These are the flowers of Crassula Jade
crassula jade.jpg 
This one is a cultivar called Hummel's Sunset 
crassula hummels sunset.jpg
The flowers on the Silver Dollar haven't opened yet but they are white in the centre with pale pink petals 
I wonder why the Gollum doesn't want to give me flowers, it seems happy enough!