All of our flint is known as Georgetown and Central Texas Flint (Chert) and is among the hardest flint known, which made it a popular material for Indian arrowheads and spear points. It is found mainly just below the ground surface and has been exposed to the elements which gives it superior hardness and strength. We clean the material by hand and remove most of the algae growth but we are not aggressive as that may damage the stone.
None of our flint has been fire-treated, unless it was done by nature. Fire-treating (heat treating) is sometimes done to improve the hardness of the flint, but this is not necessary for Central Texas Flint.