Haworthia cymbiformis
Native range: South Africa
Known names: Window succulent, Cathedral Window Succulent
Hardiness: Best kept above freezing
Mature Size: ~3" tall, cluster-forming
Light: Direct morning sun, dappled ligbht, half-day sun. Can tolerate afternoon sun but looks better without the scorch.
Water: If possible, avoid much winter water, maybe once a month. Water more often during summer.
Soil: Fast draing, coarse succulent soil
Dormancy Period: N/A
Pet-Safe: Yes
Plant Size: Grown in 4" pot, shipped bare root
 
Haworthia cymbiformis is a fairly large species (comparatively), rosette-forming succulent with plump, boat-shaped leaves that curve inward toward the center of the plant. The leaves are thiccc and green unless stressed, then they turn shades of orange and purple nit usually with semi-transparent “windows” near the tips that allow light into the inner leaf tissue. Flower inflorescence are ~2' long!
 
Haworthias, in the wild, generally grows underground with their "windows" poking up slightly to catch some sun. These succulents will actually do poorly if exposed to too much sun so it is best to grow them either with morning sun only or dappled sun or somewhere shaded away from the hot sun. 
Avoid overwatering in Summer; they'll end up rotting if the soil is wet and the weather is hot.