If experts were to be believed, the earth’s mantle holds a vast array of precious stones formed from metallic liquid running from within. One of these are diamonds that were described as large and exceptional. These diamonds from underneath are similar to the famous Cullinan Diamond which was discovered in South Africa in 1905. Some other diamonds being compared to the planet’s hidden gems in its mantle is the Koh-i-Noor which was found in India in the 13th century, and the highly-anticipated Lesedi La Rona stone which was unearthed in Botswana in 2015.

Researchers have always been vocal about the fact that diamonds are often impossible to study because of its high value. They also contain rare inclusions that trace to their origin. Aside from this, some of these extraordinary diamonds have mineral inclusions that manifest their extreme depths, especially at a distance of 224-466 miles (360-750 km) in the convecting mantle. The researchers determined that these diamonds have tiny metallic grains inside them.

Dr. Wuyi Wang, the director of research and development at the Gemological Institue of America, told Sci-news that some of the world’s largest and most valuable diamonds “exhibit a distinct set of physical characteristics. He also added that this gave many the impression that the disparity between them and more common diamonds are major. Furthermore, he also said that how these diamonds form can give researchers some answers about the mysteries of our planet’s origin. Wang and his fellow authors expedited large gem diamonds through their ‘offcuts,’ or pieces left over after the gem’s facets are cut to achieve maximum sparkle.

According to Science online journal, a group of researchers led by Wang and fellow expert Evan Smith probed mineral inclusions into very large diamonds, where abundant slivers of iron metal surrounded by minimizing gases can be found. Recent studies have discovered that the earth’s mantle is rising. This also causes the shorelines to rise.