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Reniform, Kidney-like

Group of spherical aggregates of crystals, and its flattened appearance looks like a kidney.

• Classification: Aggregates of crystals - Group of spheres

• Frequency:
• Cubic: common
• Tetragonal: common
• Orthorhombic: common
• Hexagonal: common
• Trigonal: common
• Monoclinic: common
• Triclinic: common

• Examples:
• Agate
• Aragonite
• Chalcedony
• Malachite