natural diamond vs lab grown: How are Natural Diamonds formed?

Natural diamonds are formed deep within the Earth's mantle, where intense heat and pressure cause carbon atoms to crystallize into diamonds over millions of years. The process of diamond formation is a complex one that involves a combination of geological processes, chemical reactions, and extreme conditions.

Diamonds are made up of carbon atoms that are arranged in a specific crystal structure known as a diamond lattice. This lattice structure gives diamonds their unique properties, including their exceptional hardness, high refractive index, and brilliance.

The Formation of Natural Diamonds

The process of natural diamond formation begins with the deposition of carbon-rich material, such as organic matter or sediment, deep within the Earth's mantle. This material is then subjected to intense heat and pressure as it is buried deeper into the Earth's crust.

At a depth of approximately 100 miles, the temperature and pressure conditions become extreme enough to cause the carbon atoms to bond together and crystallize into diamond. This process, known as "diamond stability field," occurs in areas where temperatures are high enough to melt rock, but where the pressure is so great that the carbon remains in a solid state.

Over millions of years, the diamonds continue to grow and are slowly brought closer to the Earth's surface through the movement of tectonic plates and volcanic activity. Eventually, the diamonds are brought close enough to the surface where they can be mined.

Types of Natural Diamonds

There are two main types of natural diamonds: Type I and Type II.

Type I diamonds are the most common and account for approximately 98% of all natural diamonds. They contain trace amounts of nitrogen, which gives them a yellow or brown tint.

Type II diamonds, on the other hand, are much rarer and account for only around 2% of natural diamonds. They contain little or no nitrogen and are often colorless or have a gray or brown hue.


The formation of natural diamonds is a fascinating and complex process that involves extreme heat and pressure over millions of years. The result is a precious gemstone that is valued for its unique beauty and durability. While lab-grown diamonds offer a sustainable and affordable alternative, there is still something special about owning a natural diamond that has been formed deep within the Earth's mantle over millions of years.