closed as off-topic by trond hansen, Peter Jansson, Camilo Rada, Gimelist, gansub Mar 7 at 12:00
This question appears to be off-topic. The users who voted to close gave this specific reason:
- "Please review our rock identification guidelines to provide the missing information so that your question is both answerable and useful to new users." – trond hansen, Peter Jansson, Camilo Rada, Gimelist, gansub
This is man made glass. The fracture pattern is characteristic of glass, and no natural glasses that I know of have this colour.
The area where you found it is well known for its glass making history. From the Wikipedia page:
Streator is a city in LaSalle and Livingston counties in the U.S. state of Illinois. The city is situated on the Vermilion River approximately 81 miles (130 km) southwest of Chicago in the prairie and farm land of north-central Illinois.
Glass making and, more specifically, glass blowing was a highly skilled craft. Most of America's glass blowers came from Europe, or were trained there. Many of Streator's immigrant coal miners were trained in glass blowing. High-grade silica, the main ingredient in glass was in abundance in the Streator region and nearby Ottawa. The combination of silica, coal to fire the furnaces and skilled craftsmen were a perfect match for Streator's second major industry which began in 1887 with the Streator Bottle and Glass Company. Other companies like Thatcher Glass Manufacturing Corp (later Anchor Glass Containers) which began manufacturing milk bottles in 1909, the American Bottle Company in 1905, the Streator Cathedral Glass Company in 1890, Owens-Illinois and others soon followed. Through the 20th century Streator was known as the "Glass Container Capital of the World."
Emphasis my own. Bottle glass is commonly green, exactly the same colour of your specimen.