This delicate onyx and marcasite ring is perfect for all occasions it was once thought that onyx eliminates negative thinking heightens the senses and improves intuitiononce used as a substitute for the shine of a diamond the natural semi precious gemstone marcasite is now celebrated for its lustre and metallic beautyonyx informationnumber of stones 1stone shape squarestone size 5x5mmcarat weight 033naturalcreated natural onyxmarcasite informationnumber of stones 28stone shape r