Crystal Systems is the word for "observe number and angle of crystal faces."
HORSE ISLE ANSWER~ Faces
If a mineral belongs to the hexagonal crystal group, then its crystals have six sides.
Number of faces on a square pyramid is 5.
A polyhedron with the fewest number of faces is a triangular pyramid - it has four faces including the base.
Two faces with a 90 degree angle between them. Such as two faces of a cube which are next to each other (like to sides of a die which are next to each other).
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.
sorry i do not know
Too Do This You Must Have Thee Correct Objects .
Too Do This You Must Have Thee Correct Objects .
sorry i do not know
A crystal is a polyhedral shape. The number of faces (which means the same thing as sides) depends on the crystal.
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.
the faces on a crystal...
Faces
in the angles between faces and the number of edges of equal length
In the angles between faces and the number of edges of equal length
It is a crystal, all of whose faces are polygons.