Fossilised Mammoth Ivory Ring
CIJ-T-16
NAVAJO
Circa around the 60/ 70s?
Length of stone 7/8”
Width of stone 5/8″
Weight 21-31
Size 12.75 – Z  This ring cannot be down sized by much – 1 to 1 .5  in size would be my guess.
Materials – Hallmarked  9.25
Hallmark – yes but is unknown