A Diamond Found in Botswana May Be the Rarest of Its Kind Found to Date

A Diamond Found in Botswana May Be the Rarest of Its Kind Found to Date — and experts say it could change what we know about diamond formation beneath the Earth’s surface. The astonishing gemstone, discovered at the Karowe mine in northeastern Botswana, has captured global scientific and industry attention due to its striking pink and colorless diamond split structure and extraordinary size.

Weighing an impressive 37.41 carats, the diamond is currently under examination at the Gemological Institute of America (GIA), where researchers are working to understand how such a rare gem could have formed.

A Geological Marvel: Two Stories in One Stone

According to scientists studying the stone, the diamond did not form all at once. Instead, they believe the gem developed across two separate geological eras deep within the Earth’s mantle, more than 100 miles below the surface.

The pink half of the stone likely began as a normal, colorless diamond. Over millions of years, tectonic pressure and structural stress caused the crystal lattice to warp — a unique condition that produces pink diamonds.

Meanwhile, the clear half formed later under stable conditions, untouched by that deformation. This clean split between the two regions makes the jewel unlike any diamond ever documented.

GIA senior diamond specialist Sally Eaton-Magaña explained that the dual-phase formation is the key to the diamond’s uniqueness:

“The pink section was plastically deformed during a mountain-forming event millions of years ago, while the colorless portion formed under different, steadier conditions.”

The Rare Science Behind Pink Diamonds

Though diamonds may appear simple — just carbon atoms under intense pressure and heat — the story is far more complex. Most colored diamonds gain their hue from trace elements like nitrogen or boron.

Pink diamonds are different.
They owe their color to structural distortion, not impurities.

Too little distortion — the diamond stays clear.
Too much — it turns brown.
The conditions must be exactly right, a geological “Goldilocks zone.”

As geologist Luc Doucet famously said:

“There are many brown diamonds, and very, very few pink diamonds.”

This makes the pink section of the Botswana gemstone exceptionally rare — and the combination with its flawless clear half even more extraordinary.

Unprecedented Size Sets It Apart

While dual-color diamonds have been recorded before, none have been anywhere near the size of this discovery. Previously documented stones of similar structure rarely exceeded two carats.

This one?
Over 37 carats.

The scale of this stone has stunned the global Botswana diamond industry and researchers. Its size and clarity could make it one of the most valuable diamonds ever handled — depending on how, or if, it is cut.

Some experts believe the gem may be too historically significant to enter the luxury market and could instead become a museum centerpiece.

Karowe Mine Continues Its Legacy of Remarkable Diamonds

The Karowe mine is no stranger to world headlines. Operated in northeastern Botswana, it has been the source of several record-breaking diamonds, including:

Botswana currently produces about 20% of the world’s diamonds, with mining revenues helping fund schools, roads, hospitals, and national development.

A Geological Time Capsule from Earth’s Deep Past

Diamonds like this one act as scientific records. They preserve chemical and structural traces of the forces shaping the Earth over billions of years.

The pink half likely formed during a continental collision, the type of event that once created the Himalayas. The clear half formed later during calmer geologic conditions.

This means the stone is not just a gemstone — it is a piece of Earth’s geological history frozen in crystalline form.

What Happens Next?

Before any cutting or polishing decisions are made, experts at GIA will continue to analyze the stone. Cutting such a rare diamond is an irreversible act and must be considered carefully.

If cut for jewelry, it could become one of the most valuable gemstones ever sold.
If preserved intact, it could become a global museum attraction.

Representatives from HB Antwerp, the firm analyzing the stone, acknowledged its rarity:

“Stones of this size and nature are exceptionally rare. This piece may ultimately belong in a museum.”

Botswana’s Diamond Future

While Botswana remains one of the world’s leading diamond producers, deeper deposits are becoming harder to reach. The government faces the challenge of using today’s mineral wealth to build long-term economic sustainability.

Discoveries like this are reminders of the country’s geological richness, but also signals of the need to invest in infrastructure, innovation, and value-added diamond processing.

Final Thoughts

This extraordinary gemstone does more than shine. It tells a story of tectonic pressure, deep-Earth crystal evolution, geological time, and national pride.

A Diamond Found in Botswana May Be the Rarest of Its Kind Found to Date — and it represents both scientific wonder and a precious chapter in the story of the Botswana diamond industry.

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