An Austrian gold diamond and enamel set book form locket, c.1900, with red champlevé enamel wording 'feuille de bonheur' translated as 'leaf of happiness'. Rose cut diamonds forming the 'f' and 'b', with rose cut diamond set clover leaves, to a bloomed ground. Austrian marks for 750 standard, for Vienna. 19 x 16mm excluding bale, 7.18g Condition report: Tarnished. Clasp requires adjustment. Surface scratches. The locket is solid gold. This type of tarnish can be caused by it being stored with silver jewellery, or gold jewellery with a high silver content. As the locket has a bloomed finish I would not recommend that it is polished - it will strip the original finish. It requires specialist cleaning in a workshop used to dealing with period jewellery.