These unique marcasite and black onyx art deco style earrings are vintage style at its finest once used as a substitute for the shine of a diamond the natural semi precious gemstone marcasite is now celebrated for its lustre and metallic beauty teamed with a classic rectangular baguette cut onyx gemstone this art deco design flaunts geometric lines crafted in 925 sterling silveronyx informationnumber of stones 2stone shape octagonstone size 12x4mmcarat weight 222naturalcreated natur