Flint is a very hard rock and forms very sharp glassy flakes when hit with another flint. Flint was used to make knife blades by early man and is the ancient remains of sea sponges and are found in layers in chalk. Flint was also used to generate a spark in tinder boxes(a predecessor to matches) and to ignite gunpowder in early firearms.
Zea mays indurata is also known as Indian corn, flint corn or calico corn. Each kernel has a hard outer layer to protect the soft endosperm, so it is a "hard as flint". It is NOT a hybrid.
soft glass Hard glass crown glass flint glass glass ceramics etc
flint
Flint is generally associated with making spearheads and fire starting. Flint is a hard gray rock consisting of nearly pure chert. Bituminous coal would be too soft for spears.
Lime stone varies from crumbly to almost as hard as flint, depending mostly on how much weight was above it when it was being formed.
flint
The address of the North Flint Library is: 5005 Cloverlawn Drive, Flint, 48504 2067
flint and steel use it to detonate tnt ^.^
Flint has a waxy luster.
A flint and tinder
Flint
they were made of flint. they were made of flint. they were made of flint.