About Tanzanite

Tanzanite is the blue/violet variety of the mineral zoisite (a calcium aluminum hydroxyl Sorosilicate) belonging to the epidote group. It was discovered by a Tanzanian Jumanne Mhero Ngoma in the Mererani Hills of Manyara Region in Northern Tanzania in 1967, near the city of Arusha and Mount Kilimanjaro. Naturally formed tanzanite is extremely rare and is endemic only […]

The Carmen Lúcia Ruby: A Love Story

Since 2004, visitors to the National Gem and Mineral Collection at the Smithsonian’s National Museum of Natural History in Washington, D.C., have marveled at the Carmen Lúcia Ruby, one of the world’s largest and finest examples of July’s official birthstone. At 23.10 carats, the extraordinarily rare Burmese ruby exhibits a richly saturated red color known […]

The Alan Caplan Ruby

“Alan Caplan Ruby” also known as the “Mogok Ruby” gets its name from Alan Caplan the famous geologist and mineralogist and also mineral and gemstone dealer who acquired the stone while on a trip to Burma in the 1960s or 1970s. The ruby remained in his collection until 1988, when it was disposed for a […]

The 138-Carat ‘Good Luck’ Ruby

Back in the late 1950s, TV advertising pioneer Rosser Reeves purchased an unmounted star ruby and carried it in his pocket for good luck. This was no ordinary ruby. With its rich red color and well-defined star, the 138.72-carat ruby was said to be the largest and finest star ruby the world has ever known. […]

The Graff Ruby

London luxury jeweler Laurence Graff has paid a record 8.2 million Swiss francs ($8.6 million) for a Burmese ruby, the top lot at a Geneva auction marked by strong prices for fine diamonds and rare colored stones. Graff, known as the “King of Diamonds”, was buying the ruby of 8.62 carats for the second time, having […]

New Places to Find Rubies

Republic of Macedonia is the only country in mainland Europe to have naturally occurring rubies. They can mainly be found around the city of Prilep. Macedonian ruby has a unique raspberry color. The ruby is also included on the Macedonian Coat of Arms. In 2002 rubies were found in the Waseges River area of Kenya. […]

Where Do Rubies Come From?

The Mogok Valley in Upper Myanmar (Burma) was for centuries the world’s main source for rubies. That region has produced some of the finest rubies ever mined, but in recent years very few good rubies have been found there. The very best color in Myanmar rubies is sometimes described as “pigeon’s blood.” In central Myanmar, […]

The Lore of Ruby

Like a perfect red rose, the Ruby’s rich color speaks of love and passion. Called the “Rajnapura” or King of Gems by ancient Hindus, July’s birthstone is among the most highly prized of gems throughout history. The Ruby was considered to have magical powers and was worn by royalty as a talisman against evil. It was thought […]

How Does Alexandrite Change Color?

The color changing property of Alexandrite is known as ‘Alexandrite effect’ and is a result of chromium traces found in the gemstone. The chromium traces cause strong light absorption in the yellow and blue parts of the spectrum. The absorption band 580 nm allows the Alexandrite to change color from red to green when seen […]

The World’s “Largest” Emerald Is a Fake

The story begins with much excitement. The gem, named Teodora, was found in Brazil and cut in India, before being sold to rare gems dealer Reagan Reaney in Calgary – but there are doubts over whether it is in fact a true emerald. ‘I’m positive it contains emerald but I’m not sure how much of […]