Three Slabs Black Jet from Pennsylvania
I bought these three slabs of jet from a vendor at a gemstone show. She indicated that they came from Pennsylvania. The largest piece is 4-1/4 x 1-1/8 x 1/4" and the smallest piece is 1-3/4" x 1-1/4" x approx 1/4". Though not truly a gemstone, I've put it in that category for lack of a better one.
To see my other "gemstone jewelry", click here