Yes, a mineral can still be classified as a crystal even if it does not exhibit smooth faces. Crystals are defined by their orderly internal arrangement of atoms, which results in a specific geometric shape, regardless of surface smoothness. Factors such as growth conditions, environmental influences, or physical damage can lead to rough or irregular surfaces while still retaining the crystalline structure internally.
Mineral crystal faces of varying luster and geometric shapes.
Beneficial to euhedral crystal shapes would be the proper temperature and length of time spent in ideal conditions for crystal formation for the particular mineral. Ideal conditions would include: space available for mineral crystal growth and availability or supply of mineral rich solutions bearing mineral components.
The visibility of crystal faces on minerals depends on several factors, including the mineral's growth conditions and its environment. Some minerals may not have well-formed crystal faces due to rapid growth or space constraints, which can lead to irregular shapes. Additionally, factors like weathering, erosion, and mechanical damage can obscure or alter the crystal faces, making them less visible. Lastly, certain minerals may form in such a way that their crystal faces are inherently small or poorly developed.
A six-sided mineral crystal, also known as a hexagonal crystal, is characterized by its six symmetrical faces and typically forms in a hexagonal shape. Minerals such as quartz and beryl commonly exhibit this crystal system. The arrangement of atoms within the crystal lattice results in unique physical properties, including distinct cleavage patterns and specific optical characteristics. This structure is significant in mineralogy and crystallography, influencing how the mineral interacts with light and other materials.
The sparkle is the reflection of light off the mineral crystal faces or cleavage surfaces.
cleavage surface are smooth and shiny as the fracture is due to weakness in the bonds between the atoms rather than a breakage. Crystal face is where the crystal development such as twinning take place.
Mineral crystal faces of varying luster and geometric shapes.
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crystal
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They accumulate in crystal faces.
I believe the answer would be the crystal system, but the crystal system is based on the angles and length of the axis of the crystal. The axis length and the angle at which they meet would affact the number and angle of the crystal faces.
If a mineral belongs to the hexagonal crystal group, then its crystals have six sides.
The area of crystal growth usually takes place on the outermost layers of crystal faces.
The sparkle in minerals is usually caused by their crystal structure and the way they interact with light. When light enters the crystal lattice of a mineral, it can be reflected and refracted, creating a sparkling effect due to the reflection and dispersion of light off the crystal faces. The presence of impurities or inclusions in the mineral can also contribute to its sparkle.
A crystal mineral is a naturally occurring solid substance with a specific chemical composition and a highly ordered atomic structure, resulting in a symmetrical external shape with flat surfaces called crystal faces.
A variety of the mineral zircon. "Name refers to its curved crystal faces. From the Greek κνρτος, for bent." mindat.org