What is a Natural Diamond?

Answer: A natural diamond is a precious gemstone formed over millions of years under intense heat and pressure deep within the Earth’s mantle. Here’s a breakdown of its key characteristics:


  • Formed naturally over a timeframe of 1 to 3 billion years under extreme conditions of high pressure (approximately 67,000 times atmospheric pressure) and high temperature (around 900°C to 1300°C).
  • These extreme conditions compress pure carbon atoms into the tightly packed cubic crystal structure that defines diamonds.
  • Brought to the Earth’s surface through volcanic eruptions or other geological processes over millions of years.


  • Made up entirely of carbon atoms arranged in a unique 3D structure. This structure gives diamonds their exceptional hardness, making them the hardest naturally occurring substance on Earth.
  • Can range in color from colorless (D on the GIA scale) to various shades of yellow, brown, green, blue, pink, or even black due to the presence of trace elements during their formation.


  • Renowned for their brilliance and fire, which is the ability to disperse light into a rainbow of colors. This is due to the specific way light interacts with their internal structure.
  • Highly resistant to scratches and chemicals, making them ideal for jewelry applications.
  • Each natural diamond is unique, with its own individual characteristics and internal markings.

Comparison to Lab-Grown Diamonds:

  • While sharing the same physical and chemical properties, lab-grown diamonds are created in a controlled laboratory environment over a much shorter period (weeks to months).
  • Natural diamonds often carry a higher price tag due to their perceived rarity and historical significance. However, the value of each diamond, whether natural or lab-grown, depends on various factors like the 4Cs (Cut, Color, Clarity, Carat Weight).
  • IGI is the first laboratory to grade lab-grown diamonds.


  • Used not only for their beauty in jewelry but also for their industrial applications due to their exceptional hardness and thermal conductivity.
  • Natural diamonds have played a significant role in human history and cultural symbolism for centuries.

In conclusion, a natural diamond is a unique and valuable gemstone formed through a remarkable geological process, prized for its beauty, durability, and historical significance.

To top