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  • For fractures in rocks and minerals per se, see Fracture (geology) In the field of mineralogy, fracture is a term used to describe the shape and texture of the surface formed when a mineral is broken. Hackly fracture (also known as jagged fracture) is jagged, sharp and uneven. — “Fracture (mineralogy) - Wikipedia, the free encyclopedia”,
  • The surfaces of the massifs are hackly. It is best developed along inner edge of basin where steep inward-facing scarps are common, grading outward into smaller massifs and blocks. It marks the crest of most prominent ring structure around Caloris. Type area: region near 18°, 184.5° (FDS 229). — “Caloris Montes - Wikipedia, the free encyclopedia”,
  • Hackly fracture. Tenacity. Malleable, flexible. Mohs scale hardness. 5-5.5. Luster. metallic Widmanstätten pattern showing the two forms of Nickel-Iron, Kamacite and Taenite, in an octahedrite meteorite. Taenite (Fe,Ni) is. — “Taenite - Wikipedia, the free encyclopedia”,


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