A stunning art deco style ring crafted from sterling silver set with a large marquise cut black onyx gemstone surrounded by sparkling marcasite gemstonesit was once thought that onyx eliminated negative thinking heightened the senses and improved intuitionlining the geometric shapes of this art deco jewellery design is the natural semi precious gemstone marcasite that is celebrated for its lustre and metallic beauty its glisten perfectly compliments the darkness of the gothic black onyxbla