A chandelier pendant by Italian jeweller Damiani (with matching pieces, including earring). This is set with 1.26 carats of rose cut diamonds in 18k white gold. You can see more of the collection on the Damiani web site.

Damiani describes the collection this way:

The special charm of jewelry collection for women Juliette is a result of the perfect combination of rose cut diamonds with its very particular pattern: delicate semicircles that merge Oriental influences with fin-de-siècle architectural elements, Art Decò rigors and the delicacy of the Art Nouveau, known in Italy as the “Liberty style” (known in the US as the Tiffany style). The gold and diamond rings, necklaces, earrings that are part of this Damiani jewelry collection are characterized by an ageless heritage, capable of inspiring the magic and passion for the mysterious enchantment of the past.