Stamped With Hallmark: "Calvin Begay" and "Sterling"
This jet takes an excellent polish and does resemble the harder materials, but under a microscope the jet shows grain and cell structure from its origins as wood turned by mother nature into jet, which is a harder close relative of Coal; it can be easily scratched or etched with a steel tool. Jet is used my many Native American artists
For size reference we usually include US. Coins and currency A Silver Dollar is approx. 37.5 MM in diameter (Just under 1 ½ “)
A penny is just under 19 MM approx. ¾” (A Quarter is approx. 24 MM or 15/16" ) A half dollar is just over 30 MM or just under 1 ¼” A Nickel is approx. 21.2 MM