Monthly Archives: June 2014

The Ultra-Rare Purple Diamonds

Purple Rain

To celebrate the 30th anniversary of the release of Prince’s seminal album Purple Rain, we decided to look at some purple diamonds.

Among the most rare of all color diamonds, purple diamonds are most commonly thought to be caused by intense pressure put on the stone mixed with the fact that trace amounts of hydrogen were introduced as the diamond was formed millions of years ago.   However, some gemologists believe that since purple is a mix of blue and red, these color diamonds were caused by an introduction of boron within the structure as well as some inherent defects in the crystal lattice structure of the stone.  Purple diamonds are generally found in Australia but there have been instances of purple diamonds found in places such as Russia, South America and North America.

The Royal Purple Heart Diamond is the largest and most famous purple diamond ever recovered in history.   The confirmed facts about the stone are that it is heart-shaped, weighs in at 7.34 carats and has a clarity of I-1.


In the picture of the Royal Purple Heart diamond, it appears to be more blue than purple.   However, British gemologist Michael Hing upon inspecting the stone in 2002 said “The stone has diagonal surface graining that is clearly visible to the naked eye on the table facet if you look at it under a glancing light.”

Hing went on to say that “It is not as blue as in your photo, it’s more purple than lilac.”

The second most famous purple diamond is the Supreme Purple Heart.   Even less is known about this stone.  Despite it’s name, actually has a round brilliant cut.   The diamond is believed to have been found in the Amazon Basin of South America, weighs between 2 and 5 carats and appears to have a purple color from one angle and a red color from another angle.

If you would like to check out a purple diamond for yourself, here is a look at some of our personal favourites here at Ouroboro Diamonds of Rare Colour:

A 0.15-carat Fancy Purplish-Pink Pear-Cut Diamond


A 0.17-carat Fancy Purplish-Pink Princess-Cut Diamond


A 0.51-carat Fancy Intense Purplish-Pink Emerald-Cut Diamond





The Largest Color Diamond Ever Put Up For Auction In Canada


Toronto-based auction house Ritchies is hosting their Prestige Auction this weekend and will be highlighted by the sale of the largest color diamond ever to go under the hammer in Canadian history.


The rectangular radiant-cut yellow diamond weighs in at a hefty 30.12 carats.   Ritchies has not listed what the estimated sale price could be, however, it is expected to be in the muti-million dollar range.

Other color diamonds to be featured in the auction include:

Very Important Heart Shaped Yellow Diamond Ring


Estimated to sell for half a million dollars, this ring is centred by an 18.06-carat Fancy Intense yellow Heart-Shaped diamond.   The setting for the piece is made of 18 karat gold and platinum.

Fancy Yellow Diamond Ring


A Fancy Yellow diamond ring weighing in at 3.03 carats with a diamond surround featuring 1 carat of brilliant-cut white diamonds.   Estimates have the piece selling for as high as $75,000.

Color Diamond Bracelet


An 18 karat gold bracelet featuring 26.46 carats of brown, yellow and white diamonds.   Industry experts believe this piece will end up selling for between $30,000 and $35,000.

Fancy Yellow Diamond Ring


Estimated to sell for $25,000 – $30,000, this piece features a 4.43-carat Cushion-Cut Fancy yellow diamond as the centrepiece.   The 18 karat white gold ring is fully adorned with an additional carat of small white diamonds.

Another Massive Color Diamond Sale For Christie’s


Famed auction house Christie’s New York held their Important Jewels auction on Tuesday and total sales reached over $27.5 million (USD).  The auction was headlined by a rare Vivid Pink diamond weighing in at 5.50 carats.

The oval-shaped pink stone represented a third of the total sales for the days’ auction as the winning bid was $9.8 million.   It was the third impressive colour diamond Christie’s has put up for auction this Spring after the Winston Blue and The Ocean Dream.   Total sales for the three diamonds reached $42 million.

Some of the other colour diamonds that went under the hammer during Tuesday’s auction included the following:


A Rectangular-Cut Fancy Light pink diamond ring weighing in at 5.91 carats sold for $1.8 million.   The sale was a far cry from the pre-auction estimates which ranged between $575,000 and $675,000.


A stunning necklace featuring 81 Modified-Cut yellow diamonds ranging from light yellow to fancy yellow in color and 0.31 to 4.45 carats in weight sold for $293,000.


Swiss-based jeweller Chopard designed this diamond bracelet featuring 33 Modified Cut-Cornered Rectangular-Cut yellow diamonds.   The diamonds themselves range in colour from Fancy Yellow to Fancy Intense Yellow and weigh between 1.01 and 1.51 carats.   The piece sold for $269,000, well above the high-end estimate of $200,000.


This color diamond ring by Tiffany & Company featuring a 7.11-carat Fancy yellow stone in the centre sold for a surprising $118,750.   Industry experts assumed the piece would sell for between $60,000 to $80,000.

Rahaminov Diamonds Wins “Design Challenge” Award From JCK Magazine

On June 1, California-based jeweller Rahaminov Diamonds won the 5th annual “Design Challenge” award at JCK’s Platinum Innovation Awards.  Taking a look at the showcase pieces Rahaminov featured on the way to winning the award, you can see why they won.

1.   The Vibrant Bloom



This jaw-dropping ring features 8 GIA-certified color diamonds weighing in at a total of  3.21 carats.   The diamonds include two Fancy Pink, two Fancy Intense Blue-Green, one Fancy Intense Purplish-Pink, a Fancy Intense yellow-orange, a Fancy Vivid yellow-orange and a Fancy Vivid Yellow.

2.  Golden Majesty


An awe-inspiring 40.23 carat Fancy yellow diamond ring set on platinum and 18 karat yellow gold.

3.  The Fancy Pink

Photo © Erika Winters - Rahaminov Diamonds 7-carat pink diamond ring

photo courtesy of Erika Winters

A lovely 7.09 carat Fancy pink radiant-cut diamond ring.

4.  The One Hundred


This bracelet is aptly named The One Hundred as it features 100 Fancy color diamonds and weighs in at 100 carats.

5.  The Pink and Green


A 2.05 carat Fancy Yellow-Green Cushion-Cut diamond ring featuring a pink melee.

6.  The Vivid Ocean


A Fancy Vivid Bluish-Green Radiant-Cut diamond ring.


Yellow Diamonds Continue To Sparkle At Auction

Christie’s in London held their Important Jewels auction this week and yellow diamonds were the story as the winning bids far exceeded their pre-auction estimates.

1.   A Diamond Bracelet, By Bulgari

Christies bracelet

A bracelet by the Italian jewelry company Bulgari features a marquise-cut Fancy Brown-Yellow diamond at the centre with a fluted Pave-Set Brilliant and Baguette-Cut diamond surround.   Experts believed it would sell for $330,000 (CAD) at the most, however, the winning bid was more than double at almost $708,000 (CAD).

2.  A Yellow Diamond Ring


Estimated to sell at between $64,000 and $73,000, this yellow diamond ring sold at $103,038.  The piece features a Fancy Intense Yellow Diamond weighing in at 4.36 carats with a Brilliant-Cut diamond line surround.

3.  A Coloured Diamond Ring


A Square-Cut Cornered Fancy Yellow diamond ring featuring a 5.14 carat stone was expected to sell for between $45,000 and $54,000.   The final sale price was $80,140!

4.  A Gem, Diamond and Colored Diamond “Love Bird” Brooch, By Cartier


The biggest surprise of the auction was saved for this brooch featuring love birds with wings and a tail set with yellow diamonds.   Estimated to sell for around $18,000, the winning bid was over three times as much, finally settling at $68,692!

5.  A Colored Diamond Ring, By Graff


A color diamond ring by Graff Diamonds also made headlines at Tuesday’s auction selling for more than double the original estimate.   The piece featuring a 5.05-carat Fancy Yellow Cut-Cornered Rectangular diamond and Heart-Shaped diamond shoulders that was expected to sell for $27,476 at the most went for $64,112.