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Articles tagged: Howard Cohen, World's Largest Rough Diamond Sells for $53M

It wasn't 'too big to sell' after all. British billionaire and diamantaire Laurence Graff paid $53 million for the 1,109-carat Lesedi La Rona, the largest gem-quality rough diamond discovered in...

By Howard Cohen World’s Primary Source of Pink, Red and Blue Diamonds Is Nearly Tapped Out

2021 is the likely end. Rio Tinto’s Argyle Mine in Western Australia — the world’s most prolific diamond mine and primary source for pink, red and blue diamonds — is nearly tapped out.... Found in Only One Location on Earth, Tanzanite Celebrates Its 50th Anniversary

It was the 'gem of the 20th century.' It was exactly 50 years ago when a prospector named Manuel d’Souza got his first look at a cluster of intense blue crystals that had been discovered by a...
 Ultra-Rare Gemstone Could Set a Per-Carat Price Record

An ultra-rare, 2.11-carat, fancy red diamond known as the Argyle Everglow headlines the 2017 Argyle Pink Diamonds Tender – an annual showcase of the rarest diamonds from Rio Tinto’s Argyle mine...
 This Massive Diamond Might Actually Be Too Big to Sell

When the 1,109-carat Lesedi La Rona failed to meet its reserve price at Sotheby’s London in June 2016, the disappointing result was the first signal that the massive diamond was just too big to...
 This 'Fake' Diamond Only Cost $13 ... But It's Worth $448,000!

Thirty years ago, a woman from west London scooped up a showy ring for £10 ($13) at a car boot sale. Convinced that it was costume jewelry due to its low price, oversized center stone and filthy...
 He Broke Open Her Necklace ... and She Learned the Bizarre Truth

It held an amazing secret. An Australian woman named Anna wore her engagement ring around her neck for 18 months without realizing it. Anna’s boyfriend, Terry, had given her a hand-carved...
 These 'Enormously Rare' Earrings Could Bring $68M at Auction
 Jewelry Dating to Indonesian Ice Age Suggests a Flourishing Artistic Culture

Researchers found a 26,000-year-old pendant and other items. Newly discovered pendants and beads fashioned from the bones of “pig-deer” and monkey-like marsupials suggest that the Ice Age...
 'Game-Changing' Technology Traces Origins of Certain Gemstones

It uses DNA-based nanoparticles. In what has been labeled as a “true game-changer” for the colored-gemstone market, a Switzerland-based laboratory is using DNA-based nanoparticles to mark...
 This May Be the World's Most Valuable Gem — and It's Up for Auction

The price could exceed $60 million. All eyes will be on the stunning 59.60-carat “Pink Star” diamond when it returns to the big stage at Sotheby’s Hong Kong on April 4. If all goes as...
 Arkansas-Sourced ‘Esperanza’ Diamond Heads to Auction Block

It has a "triolette" shape. Here’s your chance to own a piece of Americana. The 4.64-carat D-flawless “Esperanza” diamond, which was found by Bobbie Oskarson in 2015 at Crater of Diamonds...
 Treasure Hunters Find Gold Jewelry Dating Back 2,500 Years
 Jewelry Made from Moon Rocks? It Could Happen ...

Imagine how much you could sell for Valentine's Day. Moon Express, a private company charged with unlocking the immense potential of the moon’s valuable resources, has gotten approval from the...
 Red Diamonds Might Replace GPS Systems, Make Driverless Cars a Reality

Sure, they’re the ultimate symbol of love, but diamonds also have become the darling of the scientific community. We’re starting to wonder: Is there anything a diamond can’t do? Back in...
 Diamond vs. Hydraulic Press — Guess Who Wins?

In one video, the testers seemed amazed by the outcome. A handful of YouTube channels are dedicated to crushing objects with a hydraulic press. Among the items that have been spectacularly squished...
 Consumers Mainly Consider These 2 Factors When Buying Gems

Gemfields has released a new survey on buying behavior. Color and clarity are the most important factors influencing a consumer’s gem-buying decision, according to a recent study conducted on...
 Helpful State Troopers Recover Elderly Couple’s Wedding Rings Beside Highway

The couple were ecstatic and relieved. Two Massachusetts state troopers recently went above and beyond the call of duty to recover the wedding rings of a senior couple who had lost them alongside...
 Rubies and Sapphires Surround This Distant Planet

Scientists noticed shimmering clouds. Astronomers at the University of Warwick in the UK have identified a massive exoplanet with cloud formations densely packed with rubies and sapphires. Photo...
 Guess Which Month Has the Most Marriage Proposals

It’s when 16 percent of proposals take place. If you’re feeling romance in the cool December air, there’s good reason. This is the most popular month to get engaged. Exactly 16 percent...
 Woman Throws Rings Away, Combs Through 6 Tons of Trash to Find Them

Fortunately she had some help. Long Island resident Colleen Dyckman woke up with a sickening feeling in her stomach that caused her heart to race. She couldn’t find her diamond engagement and...
 Mining Companies Set Sights on Biggest Diamonds of All Time
 $16M Diamond Nearly Ended Up as Road Filler — and It’s Possible Others Actually Did

Had the gem passed through lying flat instead of standing up on edge, it would have been rejected and discarded. Diamond images courtesy of Lucapa Diamond Co. Back in February, a thumb-shaped...
 'I Was Your Amber, But Now She's Your Shade of Gold,' Sings Demi Lovato in 'Stone Cold'

Singer thinks gemologically in song about an ex-boyfriend who moved on. Welcome to Music Friday when we bring great new songs with jewelry, gemstones or precious metals in the title or lyrics....
 Kiss Performs ‘Black Diamond’ From the Band’s 1974 Debut Album

Welcome to Music Friday when we bring you great songs with jewelry, gemstones or precious metals in the title or lyrics. Today’s song, “Black Diamond,” is a favorite of Kiss fans because it was...



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