I used to have it once but can't remember its name. It may be a type of Crassula.

Have a look at Crassula sarcocaulis

Thank you both. I was looking up Crassula, but couldn't find the correct species. Also it's in my Gou garden, but I have trouble accessing all the pages! Thank you again.

Exactly what Owdboggy said Siris. I just checked the label on one you sent me a few years ago and the name is spot on.