Lowest cost exotic and super durable. Shark also has a nice wrinkled texture and matte finish.
An attractive texture is provided by the quills giving this leather a stately quality.
Stingray is a super durable "leather" which is actually a series of calcium deposits. These deposits look like small glass beads making this one of the most attractive mediums for holster construction.
Elephant is the granddaddy of exotics, this is super rare and you are not likely to see anyone with this status symbol of exotic holster superiority on any of your fellow professionals. Not always available.