In a triclinic crystal system, all the edges, as well as bond angles, are unequal.

## Crystal system

A Crystal System refers to one of the many classes of crystals, space groups, and lattices. In crystallography terms, lattice system and crystal, the system is associated with a slight difference. Based on their point groups, crystals and space groups are divided into seven crystal systems.

### Triclinic System

All three axes are inclined towards each other, and they are of the same length. Based on the three inclined angles, the various forms of crystals are in the paired faces. Some standard Triclinic Systems include Labradorite, Amazonite, Kyanite, Rhodonite, Aventurine Feldspar, and Turquoise.

### Monoclinic System

It comprises three axes where two are at right angles, and the third axis is inclined. All three axes are of different length. Some examples include Diopside, Petalite, Kunzite, Hiddenite, Howlite, Vivianite and more.

### Orthorhombic System

It comprises three axes and is at right angles to each other. There are different lengths. Based on their Rhombic structure, the orthorhombic system includes various crystal shapes: pyramids, double pyramids, rhombic pyramids, and pinacoids. Some common orthorhombic crystals include Topaz, Tanzanite, Iolite, Zoisite, Danburite and more.

### Trigonal System

In the trigonal system (base cross-section), there will be three sides. Crystal shapes in a trigonal system include three-sided pyramids, Scalenohedral and Rhombohedra. Some typical examples include Ruby, Quartz, Calcite, Agate, Jasper, Tiger’s Eyes and more.

### Hexagonal System

It comprises four axes. Among them, three axes are of the same length and are on one plane. They intersect each other at an angle of sixty degrees. Example: Beryl, Cancrinite, Apatite, Sugilite, etc.

### Tetragonal Systems

It consists of three axes. The main axis varies in length; it can either be short or long. The two-axis lie in the same plane and are of the same length.

### Cubic System

All three angles intersect at right angles and are of equal length. Crystal shapes of a cubic system based on inner structure (square) include octahedron, cube, and Hexaciscoherdron.