Cyanotis kewensis can be propagated via stem cuttings or through division. I find stem cuttings are the most practical way.
First, cut off a small part of the stem with a few pair of leaves. Remove any lower leaves. Then, allow the stem to dry for a few days to allow the ends to callous over.
Pro tip: Dip the ends of the cutting (or single leaves) in a rooting hormone to promote the development of roots.
Next, place the cutting in soil or water. If in water, change the water weekly. In soil, wait to water for 2 weeks then resume watering.