5 1/4" Adena Keyhole Pendant made from red and black Banded Slate, found in Richland Co., OH

5 1/4" Adena Keyhole Pendant made from red and black Banded Slate found in Richland Co. Ohio. Ex. Dick Johnson Mick Van Steen Collections. From the collection of the late David Leigh Root. This item will be pictured in the upcoming book The David Leigh Root Collection - Volume 2" which comes out in early 2022.