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Different minerals color clear crystal. Iron oxides make reds and Oranges, copper makes blues and greens .

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9y ago

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How can mineral composition affect a rocks color?

No. It can vary from the visible color of the mineral and, since visible color of them ineral is not a reliable indicator of type, it is important to learn to use streak, (along with other factors), to correctly identify a mineral.


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Crystals have regular, flat faces that form at very specific angles to each other and reflect their atomic structure. To identify what type of mineral you have, consult mindat.org, or a library, or a university earth science department, a local museum with mineral exhibits, or a local mineral collecting club.


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The crystals will always form according the geometric parameters of the mineral crystal system to which they belong, but the size of the crystals varies depending on the environment in which they form.


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