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Spongy, Sponge(s)

Group of porous aggregates, where fine structures are tangled and it looks like sponges. Less open spaces than Efflorescent.

• Classification: Crystals or Aggregates of crystals - Porous

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

• Examples:
• Gypsum