I play ios 9.0.2 and games version dragon 2 version 1.0. (Couldn't find this on the bottom of the help/faqpage, buth in the settings of my ios).
I am on level 10 and used the workshop twice to craft a seashell necklace. Both times i recieved only stars and no necklace.

Then i tried to put the building in storage/cellar, this didn't work