Rock & Gem

HOW TO MAKE A MINERAL

Minerals are formed in four main ways:

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• FROM MAGMA - Hot, molten lava cools and crystalliz­es to form minerals such as topaz. • FROM WATER - Chemicals in saturated water precipitat­e, or separate, into solids. An easy example is salt, halite, that’s left behind after ocean water evaporates. • ALTERATION – As minerals react, slowly or quickly, with their environmen­t they form di erent minerals. Cuprite forms when it’s exposed to oxygen. • RECRYSTALL­IZATION - Exposure to heat and pressure alters the chemistry of a mineral to become a di erent mineral.

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