Flint vs. Obsidian

A very hard, fine-grained quartz that sparks when struck with steel.

A usually black or banded, hard volcanic glass that displays shiny, curved surfaces when fractured and is formed by rapid cooling of lava.

A piece of flint used to produce a spark.

(mineral) A type of naturally occurring black glass produced by volcanoes.

A small solid cylinder of a spark-producing alloy, used in lighters to ignite the fuel.

A slightly bluish black, the color of obsidian glass.

A piece of flint used as a tool by prehistoric humans.

(poetic) black

Something resembling flint in hardness

A kind of glass produced by volcanoes. It is usually of a black color, and opaque, except in thin splinters.

A hard, fine-grained quartz that fractures conchoidally and generates sparks when struck against a material such as steel, because tiny chips of the steel are heated to incandescence and burn in air.

Acid or granitic glass; usually dark, but transparent in thin pieces

A piece of flint, such as a gunflint, used to produce a spark by striking it with a firestriker.

A small cylinder of some other material of the same function in a cigarette lighter, etc.

A type of maize/corn with a hard outer hull.

(figurative) Anything figuratively hard.

(transitive) To furnish or decorate an object with flint.

A massive, somewhat impure variety of quartz, in color usually of a gray to brown or nearly black, breaking with a conchoidal fracture and sharp edge. It is very hard, and strikes fire with steel.

A piece of flint for striking fire; - formerly much used, esp. in the hammers of gun locks.

Anything extremely hard, unimpressible, and unyielding, like flint.

A hard kind of stone; a form of silica more opaque than chalcedony

A river in western Georgia that flows generally south to join the Chattahoochee River at the Florida border where they form the Apalachicola River

A city in southeast central Michigan near Detroit; automobile manufacturing