I mine these 300 million year old fern fossils in my native land of northeastern Pennsylvania. These well preserved ferns are exposed by strip mining. They were formed by the same geological action which formed Pennsylvania's famous anthracite coal deposits. This locality is well known for producing rare species which are not found anywhere else in the fossil record.
Please see my etsy shop for individual specimens, or contact me via email if you're interested in a wholesale order or are looking for that one fantastic specimen.