Crystal Systems is the word for "observe number and angle of crystal faces."
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Too Do This You Must Have Thee Correct Objects .
Crystal habit is the mineral property determined by the number and angle of crystal faces. It refers to the external shape of a mineral as determined by its internal crystalline structure. Crystal habit can vary widely among different minerals and is influenced by factors such as growth conditions and crystal symmetry.
Mineral crystal faces of varying luster and geometric shapes.
Pyrite crystals typically form in the shape of cubes or pyritohedrons, which are 12-sided geometric shapes with pentagon and hexagon faces. These crystals can also show striations and faces with a metallic luster.
it is the property of solid crystal that they have straight edges and flat faces.
An angle bar is an upright bar at the angle where two faces of a bay window meet.
An angle bar is an upright bar at the angle where two faces of a bay window meet.
zoom in closely at their faces and body
Euhedral crystals are well-formed crystals with distinct faces and sharp edges due to their growth in an unrestricted environment. Anhedral crystals lack defined crystal faces and edges because they formed in a confined space or in competition with surrounding minerals, resulting in irregular shapes.
Two examples of isometric crystals are diamond and pyrite. These crystals have cubic symmetry and their faces are all equal in length.