My beloved accessory for warm days is colorful bijouterie. Such a cut thing can put some delicious notes even to regular outfit. If you wear white t-shirt with jeans and statement necklace, everyone will want to considered you clothing ( and of course the owner). Here in Istanbul a lot of bijouterie shops: from mass-markets till special store which sell unique goodies. My choice is Grand Bazaar! When I want something special, I will go there!