4 3/8" Adena Bi-Concave Pendant found in Ross Co., Ohio prior to 1941. Pictured in Ohio Archaeologis

4 3/8" Adena Bi-Concave Pendant made from gray and black Slate. Found in Ross Co. Ohio prior to 1941. Pictured in Ohio Archaeologist Volume 32 #2 page 22 Who's Who #8 page 116 and Who's Who #10 page 376. Ex. Gary Davis John Berner (#J331B) Ron Helman (#2510) Rick Waibel (#15) Collections.