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Flint is a common name for a form of sedimentary rock called chert, formed from microscopic siliceous (essentially quartz) skeletons of radiolarians. As such the hardness of chert is 7, which is slighly harder than glass and considerably harder than steel. If it will scratch glass it is likely to be flint. Flint is often mistaken for limestone or marble, which is much softer and will not scratch glass.

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Q: How do you tell that a rock is flint?
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flint has an extremely bright shine


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What is the hardest rock flint or sandstone?

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Flint is a rock that you rub to make fire.


What type of rock is used to start fire?

Flint stone is used for making sparks to start a fire


Hard quartz rock that sparks when struck against steel or iron?

Flint is a hard rock that produces a spark when struck against steel. Flint is a sedimentary rock that is formed from a crypto crystalline quartz.


What is the definition of a flint rock?

Flint is a microcrystalline sedimentary rock composed primarily of quartz, exhibiting a conchoidal fracture which made it useful in tool making.


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what does flint rocks used for


How do you tell flint from other rocks?

you mine flint from gravel


What kind of rock is flint?

Flint is often referred to as a "Chemical Sedimentary" rock. Commonly formed when solid materials are dissolved by other means (water) and then redeposited in layers. This explains to a degree why flint has such a fine texture; it's comprised essentially of stuff that's small enough to be floating about in a glass of tap water. -S.M.


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Dan Flint is the drummer for British rock band, You Me At Six.


Is flint a noun?

Yes, the word flint is a noun, common, concrete noun; a word for a mineral, a form of rock, a thing. Flint is a type of rock that Native Americans used to make arrowheads out of in the past.