The 7 types of crystals
Type
Number of sides
2 examples
Image
Triclinic
Definition:
A crystal system is described by three basis vectors. In the triclinic system, the crystal is described by vectors of unequal length, as in the orthorhombic system.
6 sides Eg. Amazonite and Kyanite. 
Monoclinic
Definition:
The monoclinic system, the crystal is described by vectors of unequal lengths, as in the orthorhombic system.
6 sides Azurite and Howlite. 
Orthombic
Definition:
Lattices result from stretching a cubic lattice along two of its orthogonal pairs by two different factors. 6 sides Eg. Hemimorphite and Lolite. 
Trigonal
Definition:
The trigonal system is sometimes considered to be a subdivision of the hexagonal system. 6 sides Eg. Sapphires and Rubies. 
Hexagonal
Definition:
A crystal system characterized by three equal lateral axes intersecting at angles of 60 degrees and a vertical axis of variable length at right angles 6 sides Like Emeralds and Aquamarine. 
Cubic
Definition:
It is where the shape of the unit cell are or is shaped like a cube.
6 sides
Examples of this include sugar and diamond crystals.
Tetragonal
Definition:
It is very similar to a rectangle and to cubic crystals.
6 sides Examples are the likes of Wulfenite and Zircon. 
The 7 types of crystals
Type
|
Number of sides
|
2 examples
|
Image
|
Triclinic
Definition:
A crystal system is described by three basis vectors. In the triclinic system, the crystal is described by vectors of unequal length, as in the orthorhombic system.
| 6 sides | Eg. Amazonite and Kyanite. | |
Monoclinic
Definition:
The monoclinic system, the crystal is described by vectors of unequal lengths, as in the orthorhombic system.
| 6 sides | Azurite and Howlite. | |
Orthombic
Definition:
Lattices result from stretching a cubic lattice along two of its orthogonal pairs by two different factors. | 6 sides | Eg. Hemimorphite and Lolite. | |
Trigonal
Definition:
The trigonal system is sometimes considered to be a subdivision of the hexagonal system. | 6 sides | Eg. Sapphires and Rubies. | |
Hexagonal
Definition:
A crystal system characterized by three equal lateral axes intersecting at angles of 60 degrees and a vertical axis of variable length at right angles | 6 sides | Like Emeralds and Aquamarine. | |
Cubic
Definition:
It is where the shape of the unit cell are or is shaped like a cube.
| 6 sides |
Examples of this include sugar and diamond crystals.
| |
Tetragonal
Definition:
It is very similar to a rectangle and to cubic crystals.
| 6 sides | Examples are the likes of Wulfenite and Zircon. | |
Type
Salt
Typically formed by the evaporation seawater, containing dissolved Na+ and Cl- ions. One finds rock salt deposits ringing dry lake beds, inland marginal seas, and enclosed bays and estuaries in arid regions of the world.
Sugar
Refined sugar is made from raw sugar that has undergone a refining process to remove the molasses. Raw sugar is sucrose which is extracted from sugarcane or sugar beet. ... The sugar syrup is concentrated by boiling and then cooled and seeded with sugar crystals, causing the sugar to crystallize out.
Snowflakes
A snowflake begins to form when an extremely cold water droplet freezes onto a pollen or dust particle in the sky. This creates an ice crystal. As the ice crystal falls to the ground, water vapor freezes onto the primary crystal, building new crystals – the six arms of the snowflake
Type
Salt
Typically formed by the evaporation seawater, containing dissolved Na+ and Cl- ions. One finds rock salt deposits ringing dry lake beds, inland marginal seas, and enclosed bays and estuaries in arid regions of the world.
Sugar
Refined sugar is made from raw sugar that has undergone a refining process to remove the molasses. Raw sugar is sucrose which is extracted from sugarcane or sugar beet. ... The sugar syrup is concentrated by boiling and then cooled and seeded with sugar crystals, causing the sugar to crystallize out.
Snowflakes
A snowflake begins to form when an extremely cold water droplet freezes onto a pollen or dust particle in the sky. This creates an ice crystal. As the ice crystal falls to the ground, water vapor freezes onto the primary crystal, building new crystals – the six arms of the snowflake
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