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  1. How Are Diamonds Made? | Crystal, Pressure, & Graphite

    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 …

  2. How Are Diamonds Formed? 10 Fascinating Scientific Facts

    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.

  3. How Are Diamonds Formed - Geology In

    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, …

  4. How are diamonds formed? Learn the natural diamond creation …

    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 …

  5. Formation of Diamonds | The Cape Town Diamond Museum

    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 forming diamonds. Diamonds …

  6. How Are Diamonds Formed: A Gemmaphile’s Guide

    Aug 7, 2025 · Discover how diamonds form deep within the Earth over billions of years, and how lab-grown diamonds are made using modern technology.

  7. Where Did Diamonds Originate and How Are They Formed?

    Most natural diamonds originate hundreds of kilometers beneath the Earth’s surface, within the upper mantle. This region, extending from approximately 140 to 190 kilometers deep, provides …

  8. Geologists believe that diamonds were formed in the mantle and driven to the surface by deep-source volcanic eruptions. These eruptions produced kimberlite and lamproite

  9. How Are Diamonds Made? | Greenwich St. Jewelers

    May 20, 2025 · Natural diamonds form deep in the Earth’s mantle, where intense pressure and high heat cause carbon atoms to bond in a crystal structure. This process happens over …

  10. How are Diamonds Made? - Smore Science

    Dec 4, 2025 · Discover the fascinating journey of how diamonds are formed deep within the Earth's mantle. Learn about the geological processes that create these precious gems.