The Huichol call A. retusus Tsuwiri which means "False Peyote". It is said that if you're not properly purified, spirits will lead you to the False Peyote (hence why you have found yourself here drooling over this photo).
Ariocarpus retusus is extremely slow growing - taking at least 10 years to reach flowering age. The plant pictured is an old lady.
This two year old seedling is growing in a 2 inch pot
U.S. SHIPPING ONLY Plants ship bare root, pot/soil not included