FLINT
Dark, fine-grained, hard silica (rock) used for blades of tools. Flint when struck against other hard surfaces produces sparks and so was used for lighting fires. See Minerals and Metals.
Dark, fine-grained, hard silica (rock) used for blades of tools. Flint when struck against other hard surfaces produces sparks and so was used for lighting fires. See Minerals and Metals.