It depends on the gem all gems are diffrent
18 i think
Amethyst is the violet variety of quartz; its chemical formula is SiO2.
The crystaline form is rhombohedral
The rhombohedral system can be thought of as the cubic system stretched along a body diagonal. a = b = c; α = β = γ ≠90°.
There are six sides to a pure simple crystal.
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Cubic close packing results in cubic crystals. See the picture in the Wikipedia page (link found to the left of this answer). The answer is then: 6 sides.
If a mineral belongs to the hexagonal crystal group, then the crystals have six sides.
A hexagon will tessellate a plane so a hexagonal crystal is likely to be a hexagonal prism. In that case, it will have 8 faces.
A beryl typically has 6 sides, known as facets, due to its hexagonal crystal structure.
Beryl belongs to the hexagonal crystal system.
Cubic: crystals have 6 sides. Tetragonal: crystals have 4 sides. Orthorhombic: crystals have 3 unequal sides. Hexagonal: crystals have 6 sides. Monoclinic: crystals have 4 sides. Triclinic: crystals have no set number of sides.
Yes, quartz belongs to the hexagonal crystal system, meaning that its crystal structure has six-fold symmetry.
Emerald belongs to the beryl mineral family and typically has a hexagonal crystal structure. It forms prismatic crystals with a hexagonal cross-section and has a hardness of 7.5-8 on the Mohs scale. The vivid green color of emerald is due to trace amounts of chromium or vanadium in its composition.