A beautiful small Edwardian old cut diamond 3 stone clasp.
 
The diamonds are well matched and finely rub-over set in platinum. The diamonds have probably come from an earlier piece as they are almost table cut in design.
 
The clasp is for a single row of pearls with a tongue style catch which is hidden when closed and has a small thumb piece to assist opening.
 
The catch has a good strong snap being secure when used.
 
Era: Edwardian, 1901 - 1920
Measurements: Total diamond weight estimated 0.40 carats.
Diamonds I/J colour 
Clasp 10 mm long (14mm including rings to each end), 4 mm wide
Hallmarks: Unmarked - tests as platinum