“Fossil Walrus Tusk Ivory Cufflinks” handmade sterling silver cufflinks with ancient walrus tusk ivory by Jim Jenkins. Stunning color in these cufflinks. The ivory is from the center of the tusk, similar to the marrow in a bone. Color is the result of minerals that have been absorbed into the tusk for hundreds and hundreds of years. Not much of this color left today. These are obviously, a one of a kind.