A PAIR OF GEM-SET 'ALLEGRA' EARRINGS, BY BULGARIEach designed as an articulated row of vari-cut gemstones including an amethyst, a blue topaz, a pink tourmaline and a citrine, with round brilliant-cut diamonds highlights, mounted in 18K gold, signed Bvlgari, Italian assay marks, length 2.5cm, with maker's case