Geologists believe that the diamonds in all of Earth's commercial diamond deposits were formed in the mantle and delivered to the surface by deep-source volcanic eruptions.

Nov 12, 2025 · In nature, diamonds are created within Earth’s mantle at depths exceeding 120 kilometers (75 miles) where temperatures soar and pressures are immense. Over billions of years, …

Jul 16, 2025 · How are diamonds formed? Explore their fascinating billion-year-old origins from deep in the Earth and debunk myths with scientific facts.

Diamonds form deep in the mantle and reach the Earth’s surface through rare, powerful volcanic eruptions. These eruptions are crucial for transporting diamonds quickly to the surface, preserving …

Learn about the formation of diamonds. Diamonds were formed over 3 billion years ago deep within the Earth’s crust under conditions of intense heat and pressure that cause carbon atoms to crystallise …

Sep 12, 2024 · Diamonds are formed under intense heat and pressure deep within the Earth, making them one of nature’s most remarkable creations. Most natural diamonds are over a billion years old. …

In diamonds, each carbon atom is bonded to 4 other carbon atoms, while in graphite, each atom is only bonded to 3 other carbon atoms. The bonds in diamonds are held in such a tight structure that all …

1 day ago · Understanding how diamonds are formed offers a fascinating glimpse into the Earth's deep processes, revealing a story that spans millions to billions of years. From their intense birth …

Aug 29, 2025 · Diamonds originate deep within the Earth’s mantle, at depths ranging from 150 to 200 kilometers (90 to 125 miles) below the surface. Some rare diamonds, however, can form at even …

Dec 11, 2025 · Scientists apply extreme heat and pressure to a tiny diamond (a slice of a diamond as thick as a human hair) and a carbon source (like graphite). This mimics the natural environment …