"Real" or "natural" diamonds consist of a single element, namely carbon. After thousands of years, diamonds are created from the carbon molecules by the enormous pressure and heat in the earth's interior. Through movements in the earth's surface they finally reach the surface.
More about the topic
: How diamonds are created and where they are found
Every single natural diamond is absolutely unique. And like everything unique, it is never "perfect": Real diamonds still contain small carbon molecules. Because of them, no two diamonds are alike. (How many and how large "impurities" are inside the diamond is measured with the clarity scale
Their uniqueness and rarity make diamonds the most valuable gemstones in the world. Their breathtaking sparkle makes hearts beat faster and casts a spell over all observers. A real diamond cannot be compared with any other gemstone. And yet there are often fakes, imitations and copies of the "King of Gemstones" on the market.