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Plagioclase

Noun

Plagioclase refers to a common group of feldspar minerals that constitute a major constituent in many igneous rocks. They can be recognized by their white or light-colored appearance and typically occur as prismatic crystals.

Example sentence: The granite on this monument contains plagioclase, giving it a sparkling appearance.

Adjective

In the context of minerals, plagioclase as an adjective describes a specific type of feldspar that exhibits twinning and has a diverse range of compositions.

Example sentence: The volcanic rocks in this region are rich in plagioclase minerals.

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