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A '''euhedral''' is a [[crystal]] that shows good faces.

In [[geology]], a '''euhedral''' is a [[crystal]] with well-defined crystal faces.  In general, most crystals are composed of many small crystals which are not perfect fit together, and so lack a distinct crystal face.  A euhedral crystal is one which is composed of a single crystal lattice, and is recognizable by a large, smooth, flat crystal face.