caption: colors of gold determine color of yellow determine color of gold determined by allzing elements
exif: {"Image DocumentName": "Colors of Gold Determined by Alloying Elements", "Image ImageDescription": "Classic System: Au/Cu/Ag (and Zn) is the basis for Colored Golds Yellow. Red. Green. White Golds : Au/Cu/Ni or Au/Ag/Pd. (Ni and Pd are very strong gold whiteners )", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}