a mineral that can be cut and polished for use
diamonds & rubies
some minerals are also
usually located in rocks called ores
makes metal useful
strong yet easy to bend; shape that can be hammered or flattened; does not rot like wood; is lightweight
a gemstone that is beautiful and rare; ex: diamonds, rubies, sapphires, emeralds...
formed from volcanic magma or lava
formed by heat and pressure deep below the earth's crust
formed when layers of sediment and organic material harden
igneous rock examples
metamorphic rock examples
sedimentary rock examples
a hard, natural substance made of one of more minerals and sometimes organic materials
a rock that forms from decayed plant matter
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