Each of the energy centers of the physical complex may be seen to have a distinctive crystalline structure in the more developed entity. Each will be somewhat different just as in your world no two snowflakes are alike. However, each is regular.
The red energy center often is in the shape of the spoked wheel.
The orange energy center in the flower shape containing three petals.
The yellow center again in a rounded shape, many faceted, as a star.
The green energy center sometimes called the lotus-shape, the number of points of crystalline structure dependent upon the strength of this center.
The blue energy center capable of having perhaps one hundred facets and capable of great flashing brilliance.
The indigo center a more quiet center which has the basic triangular or three-petalled shape in many, although some adepts who have balanced the lower energies may create more faceted forms.
The violet energy center is the least variable and is sometimes described in your philosophy as thousand-petalled as it is the sum of the mind/body/spirit complex distortion totality.