hey no problem.
All of the materials are Mental Ray materials.
DGS for all but the metal on the chair- the DGS with specular and glossy on 0. The diffuse is the color.
Dilectic Material for glass- color is the col, and the IOR is Index Of Refraction. Glass has IOR of 1.52. Diamond has IOR of 2.3. Air has IOR of 1.0002. A vacuum (no air, no nothing) has perfect 1 IOR. Water is 1.3.
Hope that helps,
Matt
Live the life you love, love the life you live