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Rhombohedral, Rhombohedron(s)

Rhombus solid, which looks like a box pushed obliquely. This crystal habit belongs mainly to the trigonal system.

• Classification: Single crystal - Granular

• Frequency:
• Cubic: none
• Tetragonal: none
• Orthorhombic: none
• Hexagonal: none
• Trigonal: very frequent
• Monoclinic: rare
• Triclinic: frequent

• Examples:
• Ankerite
• Calcite
• Chabazite series
• Cinnabar
• Dolomite
• Kutnohorite
• Magnesite
• Rhodochrosite
• Siderite