Natural Green Diamonds

Natural Green Diamonds

The Ultimate Guide to Green Diamonds: Rarity, Formation & Value

Green diamonds are among the rarest and most captivating natural colored diamonds in the world. Gemologists rank them at the top of the rarity scale thanks to their unique origin story and stunning color. Unlike other colored diamonds, which typically derive their hues from trace elements like nitrogen or hydrogen, natural green diamonds get their color from millions of years of exposure to natural radiation deep within the Earth.

And yes—green diamonds are completely safe to wear. The radiation that once affected them is no longer active by the time the stones are discovered and polished. According to GIA data, natural green, blue, and red diamonds combined make up less than 0.07% of all diamonds evaluated, making them extraordinarily rare and highly sought after.

How Are Green Diamonds Formed?

The mesmerizing green color originates from the presence of radioactive elements such as uranium or thorium during the diamond’s formation. Over long periods, this radiation penetrates the diamond’s crystal lattice and displaces carbon atoms or electrons. This atomic shift typically results in a thin green layer on the surface—often called a “green skin”—though full, evenly distributed green color does occasionally occur.

This displacement affects how the diamond absorbs and reflects light. Because the green portion of the visible spectrum is reflected while other wavelengths are absorbed, the diamond takes on its characteristic hue.

Although structural defects involving elements like nitrogen, hydrogen, or nickel can also produce greenish tones, natural irradiation remains the most common cause of genuine green diamonds.

Green Diamond Color Grading: The Fancy Color Scale

Like all natural colored diamonds, green diamonds are graded using the GIA Fancy Color Scale. The main categories include:

  • Faint Green

  • Very Light Green

  • Light Green

  • Fancy Light Green

  • Fancy Green

  • Fancy Intense Green

  • Fancy Vivid Green

  • Fancy Deep Green

In the marketplace, the more intense, vivid, or deep the green, the more valuable the diamond becomes. Fancy Vivid and Fancy Deep green diamonds are exceptionally rare and command premium prices.

Why Cutting Green Diamonds Is So Complex

Because green color often affects only the outermost layer of the diamond, cutters face a challenge: how to maximize the natural color while preserving the stone’s brilliance and size. Green diamonds require precise, expert cutting to retain as much of their natural beauty and hue as possible.

Famous Green Diamonds: The Aurora Green

One of the most notable examples of a natural green diamond is the Aurora Green Diamond, which sold at Christie’s in 2016 for an astonishing $16.2 million. It remains the largest and most expensive Fancy Vivid Green diamond ever sold—solidifying its place in gemstone history.

Shop Natural Green Diamonds in Milwaukee

Discover Rare Diamonds at Schwanke-Kasten Jewelers

At Schwanke-Kasten Jewelers, we proudly serve as Southeast Wisconsin’s premier destination for natural diamond jewelry. Visit our Whitefish Bay showroom, just north of Milwaukee, to explore our exceptional selection of:

  • Natural diamond necklaces

  • Diamond engagement rings (including GIA-certified diamonds)

  • Diamond earrings and bracelets

  • Unique colored diamond jewelry

Our expert jewelers are here to help you find the perfect piece, whether you’re searching for a rare green diamond or a timeless engagement ring.

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