Small Finely Detailed Fossil Fern St Clare, Pennsylvania, USA with display stand

Small Finely Detailed  Fossil Fern St Clare, Pennsylvania, USA with display stand 

Small finely detailed fern remains on both sides. Small  area of silvery bark which can be seen  when turned to the light. on the reverse.. Lovely dark grey shale. The ferns are an attractive chalky white and although partial, have some lovely detail. The white colour occurs as a result of the oxidation and the mineral pyrophyllite. Some also have tinges of orange as a result of pyrite giving rise to this. Some have a shimmering delicate bark when turned to the light. Most of the abandoned coal mines are now difficult to access, and good quality specimens  are becoming scarcer and much harder to source. Once these are gone, they are gone  The fossil comes with an acrylic click and twist display stand.
Date: 300 to 308 million years old -Carboniferous
Provenance: St Clare, Pennsylvania, USA
Size:7.5 x 6.8 cm weight 40 gm 
Condition: Although small, it has good detail and preservation . Fragile and  needs to be very carefully handled, due to being on a shale . 

.code 100- 1009