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Pegmatite

Definition:

Pegmatite is an igneous rock that contains exceptionally large crystals, typically measuring several centimeters to meters in size. It is composed of various minerals, such as quartz, feldspar, and mica, and forms in the final stages of the crystallization of magma.

Examples:

Noun:

1. The pegmatite in this area contains beautiful gem-quality tourmaline.
2. Miners discovered a pegmatite deposit rich in rare earth elements.

Adjective:

1. The pegmatitic minerals exhibited stunning colors and unusual shapes.
2. She collected pegmatoid crystals from the remarkable pegmatite walls.

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