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Handbook of Gemmology

I recall the day I first spoke to Geoffrey Dominy. It was about 18 months ago. If my memory serves me right, my initial call was an introductory call, so yes, I was talking about Sirius Star®…the world’s brightest diamond®. Needless to say, after a very brief chat we dove right into diamond cutting, polishing, photography […]

De Beers

Shortly after the formation of De Beers Consolidated Mines Limited in March 1888, a huge light yellow octahedral crystal was found in the De Beers Mine. The gem, named the “De Beers Diamond” weighed an astonishing 428.50 (old) carat (old carats being the pre-1913 non-metric carat) and measured 47.6 mm through its longest axis and […]

Begum Blue

The “Begum Blue” diamond (seen here set in Princess Salima Aga Khan’s necklace)  is a 13.78 carat, fancy deep blue, heart-shaped diamond of unknown clarity. The “Begum Blue” diamond was the property of Princess Salima Aga Khan (formerly Sarah Croker Poole), the wife of His Royal Highness Prince Karim Aga Khan IV. The wife of the […]


This fine quality yellow oval-cut diamond, weighing about 10 carat, is named after Louis-Jean-Marie de Bourbon, Duke of Penthièvre (1725 – 95). Ryan Thompson (Famous Diamonds) managed to dig a little deeper into the history of this unique diamond. Neither the circumstances nor the date of the Duke’s acquisition of the gem appear to be known. In […]

Fly like an eagle…

In 1876 Charles Woods was digging on land he was renting in Eagle Wisconsin. He came across a stone he thought was quartz because of its smoky yellow color. He kept the stone but didn’t think anything of it. A few years later he and his family came on hard times and sold the stone […]

Chopard Universal 201

Today’s featured collection of diamonds reminds us of the recently released images of our universe’s cosmic microwave fluctuations over the full sky using five years of data. The colors represent tiny temperature fluctuations of the remnant glow from the infant universe: red regions are warmer and blue are cooler. This unique watch by legendary Swiss […]

The Shah Jahan

The Shah Jahan is table-cut or taviz diamond weighing 56.71 carat. It is one of several legendary diamonds that have been credited as a match for the Great Table Diamond first viewed and recorded by Jean-Baptiste Tavernier at Golconda in 1642 (though some claim this may be an error). Shah Jahan was the emperor of […]

Gem among gems…

  It remains the largest diamond cut in Canada- this “gem among gems” as claimed by the Vancouver Sun at the time, was cut by my father, Mike Botha in 1998- the year Master Diamond Cutters was first established in Canada. Those of you who have had the privilege of hearing the story about the […]

One (birth) stone rules them all!

April’s birthstone is the one that matters most- diamond. The ideal gift for any loved one with more choices than ever (as long as it comes with an AGS Laboratories grading report). At Master Diamond Cutters, we’ve been pushing the envelope of light performance with our Sirius Star®…the world’s brightest diamond® and several other ground-breaking new diamond shapes, […]

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