This is a very easy bolero. All you have to do is to crochet some granny squares out of any kind of yarns and to put them together as per the diagram. And you will obtain a very beautiful and modern bolero, easy to crochet.
I intend to crochet one for my daughter out of degrade Alize Diva Batik Design yarns (200 gr) with the specifications given here: http://goo.gl/CnPUu
Click the image to see a larger diagram.