The sixth edition of Signature Mumbai reveled in impressive displays of diamondsOversize, elaborate, and ­diamond-intensive were the trends du jour at the sixth edition of Signature Mumbai Feb. 22–25 at the Bombay Convention & Exhibition Centre in India. The looks played out in voluminous diamond cluster rings, some using special patented cuts that combine to form impressive statement pieces; bold necklaces, many a patchwork of traditional techniques and contemporary accents; oversize chandelier earrings with large drop sapphires, rubies, or emeralds accented by layers of diamonds; and bangles and cuffs featuring extensive filigree and rose-cut or simple rough sawn diamonds.Organized by the Gem & Jewellery Export Promotion Council, ­Signature Mumbai is aimed at India’s key bridal buyers. Once almost exclusively ruled by gold, the bridal market—which accounts for some 80 p