what we called that rocks which contain minerals
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Rocks containing valuable minerals are called ore.
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Minerals can be described and classified according to their physical properties, such as their:
Crystal structure and shape (called their habit)
Hardness (measured using the Mohs scale of mineral hardness)
Lustre (the way light reflects off them)
Colour
Translucency (how see-through they are)
Cleavage (how they break)
Density (mass to volume ratio)
as well as how they react to substances such as acids or magnets. It is the properties of minerals that make them useful for important things such as manufacturing.
A rough diamond
A rough diamond. Diamonds are the hardest minerals, with a Mohs scale hardness rating of 10 (Source: USGS [public domain] via Wikimedia Commons).
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