One beautiful elegant work done at one side of back seems to be like feathers of peacock playing all over. They are totally stonework which you can get those stones in all big size stores. You can glue it to the blouse and do your own design. You should not be using ordinary glue for this. They sell fabric glues where you can use those. Fabric glues like fevicryl.
This is one of my favourite type of blouse designs where there s 3/4 th sleeve which s the latest fashion. Sleeves are done with net materials where they do embroidery works or you can glue patch works which are available in stores.
Present saree blouse fashion is contrast color blouse to original color saree which both colors are totally different but looks great👍