ZZ Raven's are succulents and an offshoot of the ZZ houseplant. It is characterized by the deep purple, almost black color. At initial growth it is the bright green color one would associate with a typical ZZ Plant. Then it darkens over time.
These guys are easy, low maintenance and because of their large rhizomes can survive almost drought like conditions. Let them dry out between waterings to avoid root rot
ZZ Raven can grow in a wide range of light conditions, another reason for their wide spread popularity. They can handle low light all the way to bright, indirect light. Obviously like anything they will grow better with more light than less. In really dim areas they may just subsist but they likely won't produce new foliage. Direct sunlight will burn it's leaves.
ZZ don't like sitting in water so as airy and light and well draining potting mixture is ideal.
Great placement as far as lighting makes a difference on the foliage colors. It needs the sunlight so really shine