A diamond responds to incident light in three different ways. It allows a portion of light to pass through itself; it reflects another portion and refracts yet another portion of the incident light within itself. This dispersion and refraction of light is what makes the diamond sparkle.
When the path or wavelength of incident light is obstructed or diverted, the play of light does not occur. Depending on the size and type of the obstruction, this can impart a dull and lifeless look to the diamond.
Such obstructions are caused by flaws of the diamond that may either be internal or external or both. External flaws occurring on the surface of the diamonds are called blemishes while internal faults occurring within the crystalline surface of the diamond are known as inclusions.
Inclusions are acquired naturally by diamonds during their formative years deep within the womb of mother earth and are akin to birthmarks. These flaws are created due to irregular crystallization of diamond during its formation process.
Blemishes can be man-inflicted during mining, cutting & polishing or they may also have been acquired naturally.
One must understand clearly that diamonds are formed deep within the earth in the crudest of environments under unimaginable conditions of temperatures and pressures. These conditions are far removed from those of a sterile laboratory.
As a result, it is normal for diamonds to have inclusions. Inclusions are present in diamonds as a rule rather than as exceptions.
Nevertheless, inclusions need not be looked upon with distaste, if they are small and have a negligible effect on the brilliance and clarity of a diamond. In fact, the inclusions present in individual diamonds are as unique as the human fingerprint and are recorded in detail in the diamond’s gradation report.
Most inclusions do not affect the beauty of a diamond and are considered to be identifying characteristics. They allow you to properly identify your own diamond in case it happens to get lost or stolen or mixed up with other diamonds when given for cleaning or appraisal.
However, if the inclusions are too dense or widespread, they can affect the properties of the diamond in many ways:
An inclusion affects the diamond’s ability to scatter and transmit light as it obstructs the light passing through diamond. Consequently, it reduces the brilliance of diamond.
Inclusions can reduce the diamond’s 求婚戒指 resistance to fracture significantly.
Sizeable inclusions or colored inclusions mar the beauty of the diamond.
Value of the diamond decreases with increase in size and number of inclusions.
Some examples of internal flaws or Inclusions found in diamonds are as under:
‘Feather’ is a general term for fissures that might exist in a diamond. They are hairline cracks within the stone that resemble (as the name suggests) feathers. Small feathers do not usually threaten the diamond’s structure unless they rise to the surface on the top of the stone, where they are particularly prone to accidental blows.