Beryl (#12) main content.

Beryl (#12)

Part of Hall of Minerals.

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This specimen is an example of a lithium replacement mineral that formed in a complex pegmatite environment.

Complex Pegmatites: Lithium Replacement Minerals
During crystallization of a magma, the residual pegmatite fluids sometimes contain exceptionally large amounts of highly soluble elements. These fluids are chemically very active and can react with minerals formed during earlier stages of crystallization. The sample of beryl seen here (#12) has begun to dissolve in this way, for example.

Through their chemical activity, these fluids can likewise replace minerals formed earlier