Natural green diamonds are among the rarest and most fascinating gemstones in the world. Unlike many other fancy coloured diamonds, their colour is not caused by trace elements such as nitrogen or boron. Instead, green diamonds owe their unique hue to natural radiation exposure deep within the Earth over millions of years.
This extraordinary process gives green diamonds a distinct and often subtle colour palette, ranging from pale mint and olive green to deeper forest and emerald tones. Because the conditions required for their formation are so specific, natural green diamonds are exceptionally scarce.
At Affection Diamonds Australia, green diamonds are prized for their rarity, natural origin, and quiet sophistication.
How Do Natural Green Diamonds Get Their Colour?
The green colour in natural diamonds forms when the stone is exposed to natural radioactive minerals in the Earth’s crust. This radiation alters the diamond’s crystal structure, creating colour centres that absorb red and yellow light, allowing green hues to emerge.
In many cases, the radiation only affects the surface of the diamond, producing what is known as a “green skin.” Fully saturated green diamonds — where the colour penetrates throughout the stone — are far rarer and more valuable.
Importantly, natural green diamonds are completely safe to wear. The radiation exposure occurred millions of years ago and leaves no harmful residue.
Green Diamond Colour Grading
Natural green diamonds are graded using the fancy colour grading scale, which evaluates hue, tone, and intensity. Common grades include:
- Fancy Light Green
- Fancy Green
- Fancy Intense Green
- Fancy Vivid Green
Many green diamonds display secondary tones such as yellow, grey, or brown. Stones with pure green colour and strong saturation are exceptionally rare and command premium prices.
Because colour is the primary value factor, green diamonds are often cut to preserve and enhance colour intensity rather than maximise brilliance.
Natural vs Treated Green Diamonds
It is important to distinguish natural green diamonds from diamonds that have been artificially treated. Some diamonds are exposed to laboratory radiation to create a green appearance, which significantly affects value.
Certified natural green diamonds will clearly state “natural colour” on grading reports from respected laboratories. Proper certification is essential when purchasing a green diamond due to their rarity and high value.
Durability and Wearability
Like all diamonds, natural green diamonds score a perfect 10 on the Mohs hardness scale, making them suitable for everyday wear. Their durability makes them ideal for engagement rings, heirloom jewellery, and bespoke designs intended to last generations.
Green diamonds pair beautifully with yellow gold, platinum, and rose gold, offering both classic and contemporary design possibilities.
Choosing a Natural Green Diamond
Selecting a natural green diamond requires expert knowledge. Colour origin, intensity, cut, and certification all play a critical role in determining beauty and value. Because of their rarity, truly natural green diamonds are seldom available and should always be sourced with care.
At Affection Diamonds Australia, we specialise in ethically sourced fancy coloured diamonds, including rare natural green diamonds. Our expert jewellers guide clients through every detail, ensuring confidence, transparency, and exceptional craftsmanship.
