Recently Halle Berry got engaged to French actor Olivier Martinez, who presented her with an emerald stone engagement ring, instead of a popular diamond engagement ring. Halle’s engagement ring is custom-made and reportable cost $100,000 update `wp_posts` set `post_content` = 62,399) Halle’s engagement ring has an art-deco, antique look due to its large, green emerald and bespoke etching design on the band of the ring. Her engagement ring is unique as its main centre stone is a 4 carat green emerald. The emerald is beautifully set in 18 carat gold and the custom-designed ring features etching on the band that could symbolise something special to the couple. Halle’s birthstone is a green peridot gem stone, which is why we think Olivier opted for a green emerald stone over the usual diamond, for her engagement ring.