Dyckia goehringii super white form. You can try seeds

This worth showing plant Produces many regular sprouts each a replica of the mother plant.

They take ages to produce their own roots but they will;

Remove some of the old leaves axils and you will see some initial roots in there, Do not bury the sprout arched bass into the substrate. Keep it on top of the substrate and hold it firmly using wood sticks. Water it regularly and it will root and turn int a new spectacular plant