The sphere on the left has the U Roughness set to 1 and the V Roughness set to .1, the sphere on the right switches the values. Glossiness is set to 95%, diffuse colour is light yellow and diffuse strength is 66%. The spheres were subdivided (and obviously the algorithm doesn't like the triangles at the top) as otherwise the effect was being swamped by the faceting. There's a single Distant Light shining from the top-right(ish).