A stone age chisel made from green slate, found in 1934 in Kiuruvedi, Finland. 4000-2000 BCE, now housed at the National Museum of Finland [3166x4034] : r/ArtefactPorn
True Temper 1169100 5 Ft. Slate Bar with Bent Chisel and Pointed Ends
Slate and Chisel Techniques: Mastering the Art of Stone
Slate and Chisel Techniques: Mastering the Art of Stone