Let’s get to know of the rarest gemstones in the world, such as the ‘Guinness Emerald’ that came out of Fura Gems’ Coscuez emerald mine in Colombia where excavation has only reached 10% and the next gem of the century is waiting to be discovered.
Every year, the mining industry grows by hundreds of billions of dollars. The global economy is booming and demand for precious jewels, particularly colored gemstones, has never been higher.
Here are just five examples of stones that broke all records:
#1 “Star of Adam” Blue Star Sapphire—$100-300 million
The world’s largest blue sapphire was discovered in Sri Lanka in early 2016. Named the “Star of Adam,” the massive stone weighs an incredible 1,404 carats. The stone is a blue “star” sapphire, so named due to the bright six-pointed star that appears whenever light is reflected on the stone’s surface.
Estimates of the stone’s value range from the $100-$175 million range to as much as $300 million. This single stone is worth the annual gem industry of Sri Lanka, which averages $103 million per year in exports.
Interest in blue stones increased worldwide after the royal wedding of Kate Middleton and Prince William in 2011. Middleton wore a 12-carat blue sapphire engagement ring, piquing interest in the stones and sending demand upwards.
But the royal stone has nothing on the massive Star of Adam.
#2 Guinness Emerald—$500 million
The Guinness Book record holder 1759-carat emerald was discovered at the Coscuez mine, owned by Fura Gems. It was for several years the largest un-cut emerald on earth. Only 10 percent of the Coscuez mine has been explored, which means there could be several stones like the Guinness Record emerald locked underground.
Fura Gems recently announced its total takeover of the Coscuez mine. For only $10 million, the company took possession of a mine that could yield hundreds of millions of dollars’ worth of emeralds just like the Guinness Emerald.
The stone, in its un-cut form, could be worth $17 million, at a valuation of $9,800 per carat. But once it’s been cut, it could sell for a whole lot more. An 18-carat emerald ring, for example, sold at auction in June 2017 for $5.5 million.
That means the Guinness Emerald could be worth more than $500 million to the right buyer. Right now, the stone is resting comfortably in the Banco Nacional in Colombia.
#3 Chaiyo Ruby—$448 million
This mysterious stone is an enormous gemstone weighing 109,000 carats, roughly the same weight as a seven or eight-year old child. The stone has been valued at approximately $448 million.
The ruby came out of a mine in Asia, though where it was mined exactly is subject to considerable debate: both Myanmar and Thailand dispute ownership. There have also been accusations that the stone is a fake, that it was manufactured in Myanmar.
In fact, the stone is so mysterious, its current whereabouts are unknown. It vanished in the early 2000s, and may be sitting in a safety-deposit box in Laos. Some rumors speculate that it was stolen from its original owners by members of the Myanmar military.
Whatever the truth is, it’s certain that this massive stone is one of the rarest and richest finds of the recent era.
#4 Bahia Emerald—$250-$925 million
The world’s largest emerald ever uncovered in a single shard, the Bahia Emerald, weighs approximately 1.7 million carats, or 752 lbs. It was discovered in the Bahia region of eastern Brazil. The huge stone, which currently sits in a vault in Los Angeles, could be worth as much as $925 million.
The incredible stone was stored for a time in New Orleans, and was nearly washed away by the flood waters of Hurricane Katrina in 2005.
Like the Chaiyo Ruby, the Bahia Emerald is shrouded in mystery. After surviving Katrina, the stone was stolen from a secure vault in South El Monte in Southern California in September 2008. After the theft, the stone was tracked down and is now in the middle of a bitter legal battle to determine rightful ownership.
Eventually, the Bahia Emerald was awarded to FM Holdings in June 2015. But then the government of Brazil insisted it had been mined illegally, and that it rightfully belong to Brazil. That got the case started all over again.
Today, the world’s biggest emerald sits in an evidence vault at the LA sheriff’s office.
#5 Letseng Diamond–$50-$100 million
In the tiny African country of Lesotho, a massive recent discovery was made: a 910-carat colorless, pure diamond. The 6.4-ounce stone is about the size of two golf balls, but it could easily be worth tens of millions of dollars to the right buyer.
Another stone discovered by the same company sold for $20,000/carat. Analysts say the Letseng diamond could be worth as much as $40 million, and possibly much more.
Colorless diamonds, which have no visible impurities, are very rare. They are also in high demand from jewelers. The Letseng stone has almost no nitrogen in its composition. Nitrogen can give diamonds a yellow hue, so the stone’s colorless look will make it shine much brighter once it’s been cut and polished.
And a stone of this size could easily yield a number of smaller stones, cut into various jewellery.