where minerals occur

                                                 
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 where minerals occur 

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 where minerals occur

common rock - forming minerals occur widely .   

for example quartz feldspars and micas occur in granite . 

calcite forms limestones and many sands consist of quartz grains . but to find really good specimens especially of minerals that are not silicates or carbonates we must understand how they form .

some fine specimens with well developed crystals occer in igneous rocks such as pegmatites . such minerals crystallize from mineral-rich fluids left behind after the formation  of granite .

other minerals occur in veins.

which range in thickness from a few centimetres to several metres

other minerals form in cavities in rocks

important mineral associations are mentioned in the guide to mineral.

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