Solange Azagury-Partridge is probably best known for her “hot lips” ring, available in sterling silver, gold and various shades of enamel. She also does fine jewellery. This piece is part of her Chromance collection, and is called (fittingly given the predominance of green) the Chlorophyll.
It is set with emerald, ruby, and diamond with lacquer accents set in blackened 18ct white gold. There is no price; contact information is here.