I found a few promising books about jewelry specifically with a search. You will probably need to look at Egyptian art in general. Also, such books are often organized not by object, but by material type (so gold or faience , e.g.). I once wrote a piece on LBA-Iron Age seals from North Syria and had a difficult time finding solid information about Egyptian seals. Just keep trying and don't be afraid of very old books in this case, even from the late 18th century. You will also probably have to dig into German and French sources, especially pre-war. Unfortunately I would normally recommend you just go to the area of the shelves in the library where Egyptian art books are located, but that will be difficult right now I imagine. But! Most of these are available (to me via my institution) online due to a special sharing initiative set in motion by the pandemic. I imagine it is also the same for you. Look them up on your uni's library system and look for links that mention temporary access.

Andrews, Carol. 1991. Ancient Egyptian jewelry. New York: H.N. Abrams.

Russmann, Edna R., T. G. H. James, and Nigel Strudwick. 2006. Temples and tombs: treasures of Egyptian art from the British Museum. New York: American Federation of Arts in association with University of Washington Press, Seattle.

Müller, Hans Wolfgang, and Eberhard Thiem. 1999. Gold of the pharaohs. Ithaca, N.Y.: Cornell University Press.

Friedman, Florence D., Georgina Borromeo, and Mimi Leveque. 1998. Gifts of the Nile: ancient Egyptian faience. New York: Thames and Hudson.

Brunton, Guy, W. M. Flinders Petrie, and Margaret Alice Murray. 1920. Lahun. London: British school of archaeology in Egypt, University college.