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a solid inorganic substance of natural occurrence.

the solid mineral material forming part of the surface of the earth and other similar planets, exposed on the surface or underlying the soil or oceans.

a part or aspect of something abstract, especially one that is essential or characteristic.

: something that is formed by combining two or more parts. especially technical : a substance created when the atoms of two or more chemical elements join together. chemical/organic compounds. a compound of sodium and chlorine.

a piece of a homogeneous solid substance having a natural geometrically regular form with symmetrically arranged plane faces.

the property possessed by an object of producing different sensations on the eye as a result of the way the object reflects or emits light.

a gentle sheen or soft glow, especially that of a partly reflective surface.

a long, thin line or mark of a different substance or color from its surroundings.

a sharp division a split

. the cracking or breaking of a hard object or material

density, mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre.

a naturally occurring solid material from which a metal or valuable mineral can be profitably extracted.

Metallic minerals are minerals which contain one or more metallic elements. Metallic minerals occur in rare, naturally formed concentrations known as mineral deposits.

Metallic minerals are minerals which contain one or more metallic elements. Metallic minerals occur in rare, naturally formed concentrations known as mineral deposits.

a mineral or petrified material that when cut and polished can be used in jewelry.

Igneous rocks (from the Latin word for fire) form when hot, molten rock crystallizes and solidifies. The melt originates deep within the Earth near active plate boundaries or hot spots, then rises toward the surface.

Sedimentary rocks are formed from pre-existing rocks or pieces of once-living organisms. They form from deposits that accumulate on the Earth’s surface. Sedimentary rocks often have distinctive layering or bedding.

Metamorphic rocks started out as some other type of rock, but have been substantially changed from their original igneous, sedimentary, or earlier metamorphic form. Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors.