I find it really hard to capture lithops flowers because the most beautiful part is the silky shine. It is tricky to catch it on camera. Fortunately by flowering in the afternoon the plants give us the best setting. The light from out of the window is barely touching the petals while the plant itself is in the shadows. And then the golden glow appears.
I bet with better equipment the pictures would turn out much better but at least the shine is visible :)