This is an original pair of Trifari Art Deco Rhinestone-studded "clip mates" (a patent of theirs) used for necklines, cuffs, I've even used them for shoes. They are called clip mates because with a back pin (not included) they can be combined into a brooch or pin.
They are *really* Art Deco -- ca. 1935 -- because the maker's mark is kTf, which they only used from 1935-1937
AND they are shiny metal, not precious (during WWII they were made out of silver because rationing)
AND their style.
All the white rhinestones are there, some limited wear underside not visible when wearing.
Exactly 1 inch long at the longest, 1 inch wide at the widest.