Diamond is a native crystalline carbon that is the hardest known mineral. It is usually nearly colourless. When transparent and free from flaws it is highly valued as a precious stone. It is also used industrially, especially as an abrasive. Crystallized carbon produced artificially is also called diamond. Diamonds make excellent abrasives, because they can be scratched only by other diamonds, or man-made materials, which also mean that they hold a polish extremely well and retain their lustre. 

We at Jewelmantra believe in imparting complete unbiased knowledge to help you make that buying experience more informed.

Let's begin with Diamonds and the most important characteristics of Diamonds viz. Shapes, Cut, Clarity, Colour, Carat, and Certification.


The shape of a diamond describes the outline of the stone and the pattern of the facets. In simple terms, it describes how the diamond looks in terms of the outside shaping and physical appearance. The most popular and stylish shapes are - Round Brilliant, Princess, Emerald, Oval, Marquise, Pear, Heart, Asher, Radiant and Cushion.


 A good cut gives a diamond its brilliance, which is that brightness that seems to come from the very heart of a diamond. The angles and finish of any diamond are what determine its ability to handle light, which leads to brilliance.


A diamond's "clarity" grade is all about the flaws (or lack thereof). There are two types of flaws:

  • Blemishes: found on the surface of the diamond
  • Inclusions: found within the diamond

"Inclusions" are flaws such as air bubbles, cracks, and non-diamond minerals found within the diamond. "Blemishes" are scratches, pits, and chips (some blemishes occur during the cutting process, most often at the girdle).

·         Because they are less common, diamonds with no or few inclusions and blemishes are more highly valued and priced.


·         The diamond colour evaluation of most gem-quality diamonds is based on the absence of colour. A colour grading scale, ranging from D to Z, is used for measuring purity... There is however instances when impurities are added on purpose to give rise to beautifully coloured diamonds.

Carat Weight

Diamond carat weight is the measurement of how much a diamond weighs. One carat corresponds to 0.2 grams. Needless to say, the higher the number of carats in a diamond, the higher is the value. Depending on the cut and density, the number of carats in a diamond of a given weight varies.


A diamond certificate is issued following an unbiased and professional examination to authenticate a diamond's attributes. The carat weight, colour and clarity are all validated, together with the diamond's exact measurements. Different institutes such as The Gemmological Institute of America (GIA), The Diamond High council and the International Gemmological Institute (IGI) offer different certifications to ensure that the diamonds you buy are as per specifications mentioned.


IGI Certification

IGI Diamond Reports give an accurate assessment of a diamond's cut, color, and clarity and carat weight according to strict international standards.

IGI Diamond Reports have different formats and presentations, customized to serve a wide range of consumer demand in our different worldwide markets. Regardless of format, every IGI Diamond Report is issued according to the strict international standards and security features for which IGI is known. Diamonds with permanent treatments are certified with such treatments noted prominently in the comment section of the report. IGI Diamond Reports are not issued for diamonds with non-permanent treatments.

Gemstones should only change hands when accompanied by a certificate attesting to quality. Regardless of location or marketplace, an authentic IGI Laboratory Report is the common language of trust and confidence in the gemmological world.

GIA Certification

GIA has since been considered the world's foremost authority in gemmology. Global standards were created by GIA to accurately determine quality of diamonds (4Cs - Cut, Colour, Clarity & Carat), coloured stones and pearls. GIA reports (not certificates) offer technical information on the dimensions, quality and identifying characteristics of a diamond. They represent the highest standard of reliability, consistency and integrity. With an increase in the number of consumers looking for authentication on the diamond purchased, GIA has ensured that the certification it offers provides accurate details to the consumer.