This too noisy after rendering, I tried to give it more samples up to 500, it changed a little, higher resolution also helped, but still it is too noisy, Caustics on nor off don't make a real difference, bounces are set to 1024. I really don't know what else I can do, and haven't found an answer anywhere.
This is the result.
This picture was taken in Rhinoceros via Vray, same scene, settings as same as it was possible, but you can see no noise here. And this is the result I would like to achieve in blender too.