Natural Diamond are the result of carbon exposed to tremendous heat and pressure deep in the earth. This process can result in a variety of "Inculcation" and "Blemishes". these Internal and external characteristics are effect beauty of Diamond. Diamond clarity refers to the absence of inclusions and Blemishes, For Evaluating Diamond Clarity involves location of these characteristics , Size , relief , nature, determining the number , as well how these affect the overall appearance of the stone.
Inclusion mean An internal characteristics of Diamond , it was formed when the formation of Diamond, so it considered as natural birthmark of Diamond. inculcation are the imperfections in the diamond, size , color , location and visibility of Inclusions determine diamond clarity. here we explain the different types of Inclusions and how they affect the appearance of the diamond.
a) Bearding :
Hair-like lines that often occur during the cutting of a diamond and extend from the girdle into the surface of the stone. If a girdle is heavily bearded, its appearance will look a grey and fuzzy fringe, almost as if it has been scratched.
b) Cavity :
A cavity inclusion is a large or deep opening in the diamond’s surface. In most cases, cavities are created during the polishing process when an internal inclusion is breached or gets dislodged from the diamond, leaving an opening on the diamond’s surface. They tend to trap dirt and oil which soon turns dark and more visible.
C) Chip :
b) Cavity :
A cavity inclusion is a large or deep opening in the diamond’s surface. In most cases, cavities are created during the polishing process when an internal inclusion is breached or gets dislodged from the diamond, leaving an opening on the diamond’s surface. They tend to trap dirt and oil which soon turns dark and more visible.
C) Chip :
D) Pinpoints :
These are very small white or black crystals that are embedded inside a diamond. These internal crystals look like a small dot, visible at 10x magnification.
These are very small white or black crystals that are embedded inside a diamond. These internal crystals look like a small dot, visible at 10x magnification.
E) Cloud:
A large concentration of pinpoints is called a cloud. A cloud thanks its name to its white color and hazy appearance. Tiny clouds aren’t usually a threat to a diamond’s clarity. But big clouds make the stone look hazy and the diamond doesn’t sparkle as much as it should.
F) Crystal :
A crystal inclusion is quite literally a mineral crystal that is contained within the diamond. Depending on the type of minerals they are, they can be colorless (this is when another diamond is embedded within the diamond), black (carbon), reddish (garnets), greenish (peridots) etc.
G) Feather :
A small crack or fracture within the diamond. Depending on your viewing angle, a feather inclusion can look transparent and almost invisible or it can catch on light and display a whitish feather-like appearance.
H ) Graining :
A small crack or fracture within the diamond. Depending on your viewing angle, a feather inclusion can look transparent and almost invisible or it can catch on light and display a whitish feather-like appearance.
H ) Graining :
Caused by irregular crystal growth, internal graining may appear milky or hazy, like faint lines or streaks. Depending on their severity, they can also appear like creases or reflections.
I) Indented Natural :
An area of the rough diamond’s surface which dips below the polished diamond’s surface. An indented natural is a part of the rough diamond that was left untouched during the polishing process and is usually found at the grid
J ) Knot:
A white or transparent crystal which reaches the surface of a polished diamond. Knot inclusions sometimes resemble raised areas on a facet surface or group of facets.
K) Needle :
An area of the rough diamond’s surface which dips below the polished diamond’s surface. An indented natural is a part of the rough diamond that was left untouched during the polishing process and is usually found at the grid
J ) Knot:
A white or transparent crystal which reaches the surface of a polished diamond. Knot inclusions sometimes resemble raised areas on a facet surface or group of facets.
K) Needle :
L) Twinning wisps :
This inclusion is a series of pinpoints, clouds, or crystals that form while a diamond is growing. During a diamond’s formation process, it may stop growing due to unfavorable conditions and twinning wisps are formed when growth restarts in a different direction, sometimes thousands of years later.
What is Blemishes in Diamonds : The external characteristics of Diamond called Blemishes , Its occur after a diamond’s formation, during the cutting, mounting, and wearing of a polished diamond. there are several type of Blemishes can see on Diamond are follows.
Abrasion :Small nicks along the diamond’s facets that can make the edges a white or fuzzy appearance.
Extra Facet : They are extra facets added to diamonds, typically on found on the girdle
Lizard Skin: Wavy or bumpy area on the surface of a polished diamond.
Natural: A rough part of the diamond that was not polished. Naturals are commonly found on or near the girdle
Nick : A small chip caused by impact from daily wear. Commonly found on the culet or girdle.
Pit: A small opening that looks like a white dot. Pits result from pinpoint inclusions that were extracted during the polishing process.
Polish Lines : Fine parallel grooves and ridges left by polishing; can occur on any facet but do not cross facet junctions
Burn Mark : Hazy surface area that results from excessive heat during polishing it also called a burned facet.
Rough Girdle: An irregular girdle surface. A rough girdle can mean a weak diamond.
Scratch : A thin, dull, white line across the diamond’s surface
Surface Graining: Milky colored streaks on the diamond’s surface .Similar to internal graining, except it appears on the surface its results from irregularities in crystal structure