Macle
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Macle is a term used in crystallography. It is a crystalline form, twin-crystal or double crystal. It is crystallographic twin according to the spinel twin law and is seen in octahedral crystals or mi
Macle formed by the merger of three pyrite crystals.
Crystal twinning
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Crystal twinning occurs when two or more adjacent crystals of the same mineral are oriented so that they share some of the same crystal lattice points in a symmetrical manner. The result is an intergr
Macle
…Macle is a term used in crystallography. It is a crystalline form, twin-crystal or double crystal (such as chiastolite). It is crystallographic twin according to the spinel twin law and is seen in octahedral crystals or minerals…
Quartz – Japan twin
30° twin of staurolite
90° twins of staurolite
Iron pyrite cross twin