Echeveria 'Chocolate' is a lovely cultivar similar to Echeveria 'Black Prince'.
It is one of the darkest varieties we've come across at the nursery. It features thick fleshy leaves and a leaf point much like the Echeveria affinis. A very tight and compact plant which will flower in the spring. Perfect for a windowsill or unheated conservatory/ greenhouse.
Source: Surreal Succulents