Miniature. Accordion. Jewell binding.
Vintage Style, Metal Book Pin Broach with Peacock Rhinestone (with safety-pin at back).
The accordion book folds into the box behind the binding which shuts with a clasp.
https://www.worthpoint.com/worthopedia/raelinda-woad-storyteller-brooch-1834080036 (similoar book-broach in the collection)