Flint is a variety of quartz that commonly occurs in rounded nodules and whose crystal structure is not visible to the naked eye. Flint is dark gray, smoky brown, or black in color; pale gray flint is called chert. When found in chalk or in other rocks containing lime, the nodules frequently have a white coating. Flint is translucent to opaque. It was early used by primitive peoples for making knives and spearheads because, although it is very hard, it is more readily shaped than stone; edges can be flaked off with comparative ease, especially those of freshly dug pieces, by pressure exerted with a piece of stone or bone. Since it is not chipped by pounding, as stone is, sharper edges are obtained. Use of flint tools defines the Stone Age cultures of the Pleistocene epoch. It was long used with steel for lighting fires and later for setting off the powder in flintlock firearms. The structureis homogeneous and it is not crystalline.
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No. Coal is not a mineral for two reasons: it lacks a crystal structure and it is organic.
Agate, being a cryptocrystalline (microscopic crystal structure) form of quartz, does not have a crystal shape.
It is rich in iron and magnesium
Minerals of a nonsilicate crystal have very high densities because their crystal structures are based on the packing of atoms that are as close together as possible. This structure is called this closest packing.
Flint
It has no crystal shape.
There is no crystal structure.
the crystal structure of halite is basically a crystal structure the is made out of repeating boxes
Beryllium's crystal structure is hexagonal.
TiSi2 - orthorombic crystal structure
Tungsten's crystal structure is cubic.
Boron's crystal structure is rhombic.
Flourine's crystal structure is cubic.
Sulphur's crystal structure is orthorhombic.
The crystal structure of fermium was not determined.
The crystal structure of phosphorous is monoclinic.
a crystal structure is a turtle in disguise