Object
The thin, outermost layer of Earth
The Crust
of a mineral, the characteristic of splitting along smooth, flat planes
Cleavage
an inorganic, naturally occurring solid material
Minerals
the property of some minerals to break with rough or jagged surfaces
Fracture
a natural material composed of one or more minerals
Rock
the light-reflecting properties, or “shininess,” of minerals
Lusture
the building block of minerals
Crystal
the colour of a mineral in powdered form; a property useful in the identification of minerals
Streak
a type of pure substance (made of one type of particle or atom) that cannot be broken down into simpler parts by chemical means and that has a unique set of properties
Element