This model is part of a collection with very detailed chess figures. (Product ID: 568130 | COLLECTION) The texture size is 2048x2048px for both diffuse and bump maps. Also included is the chess board with two 2k diffuse and one 2k bump map.
The face count of one horse without Subdivision is: 26708
Those images are rendered with Vray 1.5 SP5 via 3dsmax 2011. The MAX file setup contains the Vray studiolightning.
If you want to render with mental ray make a matt finished reflective material for the stone and use the included maps.