Flawless (FL) - No inclusions or blemishes are visible to a skilled grader using 10x magnification.
Internally Flawless (IF) - No inclusions, only blemishes are visible to a skilled grader using 10x magnification.
Very, Very Slightly Included (VVS1/VVS2) - Inclusions are difficult for a skilled grader to see under 10x magnification.
Very Slightly Included (VS1/VS2) - Inclusions are clearly visible under 10x magnification but can be characterized as minor.
Slightly Included (SI1/SI2) - Inclusions are noticeable to a skilled grader using 10x magnification.
Included (I1/I2/I3) - Inclusions are obvious under 10x magnification and may affect transparency and brilliance.
While the above is the standard, its important to note that diamonds come in raw form before they are cut and polished. The raw uncut diamond has its own exquisite character. People have now started appreciating the beauty of organic rough diamonds and raw diamond engagement rings are gaining popularity among those who want something really special.
Lab Created Diamond
Lab grown diamonds, also known as cultured diamonds, are created in a controlled laboratory setting and share the same chemical and physical properties as natural diamonds. Like a natural diamond, lab created diamond have Mohs hardness scale of 10.
Lab-created diamonds share an identical growing process to mined diamonds. They form first as carbon atoms under high temperature and immense pressure, then bond together to grow a crystalline lattice structure.
There are two common methods for creating lab-grown diamonds, Chemical Vapor Deposition (CVD) or High Pressure High Temperature (HPHT). In the CVD process, carbon atoms are deposited onto a diamond seed crystal to grow a larger diamond. In the HPHT process, high pressure and temperature are used simulate the conditions under which natural diamonds form.
Once fully formed, they are cut and polished to reveal maximum brilliance, like mined diamonds. Lab diamonds come in a variety of color and clarity grades.
Lab-grown diamonds take approximately six to ten weeks to develop in a laboratory. The value of the diamond is more affordable because of the nature of how they are created and have a considerably smaller ecological footprint.
Emerald