Discover the Value of your Jewels

Tag: diamond

Toni Cavelti

Modern Classic

Toni Cavelti is a creative artist, craftsman, and jeweller based in Vancouver, British Columbia, on Canada’s beautiful West coast. He has retired from jewellery, but continues to be a creative artist. He has said that he feels jewellery is more craft than art. However, the jewels we see from the Cavelti workshop are easy to see as art.

1960s-1970s architecturally inspired brooch

Apprenticed in Switzerland, in 1954, a young Toni Cavelti arrived in his chosen new home of Vancouver, British Columbia. He found work in the jewellery business, and his designs and style promptly became an important part of Vancouver style and society.

In the 1960s and 1970s, nature and geometry combined in vibrant designs that are both bold and joyful. The combination of space and reflection, texture and polish creates highlights and depth of form.

1960s-1970s: A classic opal and diamond brooch, featured in the Max Wyman book Toni Cavelti, A Jeweller’s Life, and offered in the Important Jewels Auction, November 2020

Light and dark form a regular part of Cavelti’s style. The textures provide depth and highlights that capture the viewer’s imagination.

Diamond earrings exploring form and texture

Fine Gems

Cavelti’s work is widely recognized as innovative, carefully considered, and expertly made. Cavelti jewels have a balance and form that is immediately appealing to the eye. They are comfortable to wear, and make a joyful statement.

Vivid rubies forming a joyful heart pendant

Owners of Cavelti jewels recall the strong relationships developed with the jeweller. They often recall the design process, and many have his original artwork framed on their walls. Many jewels were created specifically for clients.

Experiments in light and reflection, highlighted with diamonds, creates a fascinating, rich texture

Gems used in Cavelti jewels are very fine. Colours are exquisite, carefully chosen, and perfectly matched. Rubies are as red as flames, emeralds are green as grass. Clarity is strikingly good. Cut is fine. Clearly Cavelti was not prepared to cut corners, and we are all the beneficiaries of his focus on quality.

Brilliant red rubies and fine diamonds. Cavelti chose gems very carefully

Published Source: Max Wyman: Toni Cavelti, A Jeweller’s Life

In 1996, Max Wyman wrote a book, Toni Cavelti, A Jeweller’s Life, a biography of Cavelti. The book documents the progress of the artist from his early years in Switzerland to becoming an icon of the jewellery world. Nine of the Jewels featured in the book are highlights of the Dupuis Important Jewels Auction in November 2020.

Featured in the Max Wyman book, Toni Cavelti, A Jeweller’s Life: “One of the most important stones to be handled in the Cavelti workshops…”. This 5.29 carat ruby pendant is offered in November 2020.

Toni Cavelti embraced modern forms and modern materials. In 1967, a new gem was found in Tanzania. Named after its source, Tanzanite quickly became a prominent and highly desired gem. Competing with fine sapphires for beauty, tanzanite can be a rich and vibrant gem. It is only to be expected that Cavelti would choose the finest examples. In the Important Jewels Auction, November 2020, a pair of earrings, a bracelet and a pendant feature exquisite tanzanites. These jewels are also featured in the Max Wyman book.

Very fine tanzanite, weighing approximately 19.40 carats, in an expertly crafted pendant. Featured in the Max Wyman Toni Cavelti book, and offered in the Important Jewels Auction November 2020

Diamonds are a mainstay in the world of jewels. Toni Cavelti chose his diamonds with great care. There is a fine suite of diamond jewels in featured in Toni Cavelti, A Jeweller’s Life. This suite is a highlight of the November 2020 auction.

A diamond brooch and necklace, offered in the November 2020 auction. There are matching earrings, and ring also offered in the auction. All are all also featured in Toni Cavelti, A Jeweller’s Life.

Cavelti jewels are often offered in Dupuis Auctions, and we are always proud to feature them. It a rare and special opportunity to include this very important collection of Cavelti Jewels in a single auction.

A Fan Of Diamonds

Who isn’t a fan of diamonds?

Qu’apelle Fan created for DeBeers 2004 Venice exhibitition “Diamonds, Nature’s Miracle”

After seeing this extraordinary jewel, it would be difficult not to be a fan.

Created by artist Derek Olson, this functioning fan is an extraordinary work of art. Olson is a creative artist, a master goldsmith, and obviously a man up for a challenge.

In 2004, DeBeers Diamond Trading Company (DTC) accepted entries for an International Design Competition: Diamonds: Nature’s Miracle. The criteria for the competition were: “Age, Imprinted By Mother Nature, Journey (reality), Journey (mythical), and Rarity.

Derek Olson, followed up with a bold design that prompted the Competition jury to express some “concerns about the feasibility of actually creating the finished piece reflected in your design”.

Undaunted, Olson created a diamond and gold work of art that identically re-created the original painted design. The fan won the design competition.

Certificate presented to the winner
Original painted artwork for The Qu’apelle fan

The jewel is designed to celebrate the “beauty, mystique, and allure of natural diamonds”.

The base features a “diamond” shaped natural fancy coloured diamond weighing over three quarters of a carat, in place in the centre, as though it is in the centre of the earth.

Diamond at the base of the handle of the fan “deep in the earth”

Above the base is a representation of a red-hot (rose gold) lava filled fissure carrying scattered square diamonds that are being carried to the surface of the earth by an explosive volcano.

Rose gold red hot lava flow, cracking through the earth’s rocky crust, full of diamonds

Above the volcano, the fan features the power of the explosive force as the diamonds, in the hot lava reach the surface of the earth. The heat of the lava is shown by natural fancy orange and yellow diamonds.

The explosion of red-hot diamond-bearing lava cracking through the crust of the earth

The heat of the vapour from the volcano is shown with wispy veils of diamonds floating above the hot diamonds.

Veils of steam from the igneous explosion

The diamonds cool to the icy form of crystals in diamond set zig-zags in the middle of the fan.

Diamonds crystallize once they reach the surface of the earth

Having been released from the earth, and finally revealed to the light of day, the sky is full of sparkling and joyful swirls of diamond clouds, twinkling stars, comets shooting through the sky with pink diamonds, and the glowing orb of the warm diamond sun, and the perfect arc of the crescent moon.

Diamonds sparkle in the light of the stars, pink glowing comets and the crescent moon

The finished fan is a virtually identical reproduction of the original painting. It took three months of solid work to build this exquisite and unique jewel.

The fan is accompanied by a travelling stand, but, additionally has a vitrine made of glass and marble, designed for display of this treasure.

This fan is a true work of art, and like the history of diamonds is bound in its beauty, to resonate for ages to come

Diamond Carat Weight: Large is Rare

Diamonds By The Carat: Large Is Rare

Lot 400, Spring 2017

Van Cleef & Arpels ring, marquise 6.47 carat D colour, VS-1 clarity, Lot 400, offered in the Spring 2017 Important Jewels Auction, sold for $240,000


We weigh diamonds in carats. A carat is a metric measurement of 200 milligrams. That means 5 carats equals a gram. Most people will never own a gram of diamonds. While a large diamond is rare, a really large one is extremely rare. Also, most diamonds mined in the world will not be of a quality to become gems, and may be used for industrial purposes. Thus, there aren’t many gem quality diamonds

One Carat

One carat is a good sized diamond, makes an impressive statement, and is larger than most people will ever own.

1.00ct Lot 113, Spring 2017

1.00 carat, Lot 113, offered in the Spring 2017 Important Jewels Auction, sold for $4,400.

Two Carats

Two carats, that much rarer than one carat, has a value that is about twice the value, per carat, of an equivalent one carat gem, all other things being equal. Meaning that a two carat diamond is at least twice as rare as one carat, and a two carat diamond will be four times the price of an equivalent one carat (twice the price per carat, plus twice the carats).

Lot 330 Spring 2017

2.14 carat, lot 330, offered in the Spring 2017 Important Jewels Auction, sold for $16,000

As each new carat weight is reached, there can be an increase in price per carat.

Three Carats

Lot 328 Spring 2017

3.00 carat, Lot 328, offered in the Spring 2017 Important Jewels Auction

Looking at the diamonds as they increase in size, the diamond becomes rarer and rarer.

Four Carats

Lot 353, Spring 2017

4.15 carat, Lot 353, offered in the Spring 2017 Important Jewels Auction, sold for $12,000

Most people will never even see a 5 carat diamond, let alone OWN one!

Five Carats

Lot 352, Spring 2017

5.01 carat cushion shaped, Lot 352, offered in the Spring 2017 Important Jewels Auction

There is no question of the obviously impressive visual impact of larger diamonds

Six Carats

Lot 397, Spring 2017

6.35 carat, Lot 397, offered in the Spring 2017 Important Jewels Auction, sold for $90,000

A seven carat gem is a similar price per carat to five and six carat weights.

Seven Carats

Lot 334, Spring 2017

7.64 carat, Lot 334, offered in the Spring 2017 Important Jewels Auction, sold for $55,000

Once we get to ten carats, it it enough to make people stop in their tracks. The price per carat really jumps, because ten carats is so rare.

In the Spring 2017 Important Jewels auction, there are six diamonds with a weight greater than 10 carats.

Ten Carats

Lot 336, Spring 2017

10.00 carat, Lot 336, offered in the Spring 2017 Important Jewels Auction, sold for $60,000

What more is there to say? A pair of earrings: Two diamonds with a total of over 27 carats!

Thirteen Carats (Each)

Lot 404, Spring 2017

13.58 carat, and 13.62 carats, Lot 404, offered in the Spring 2017 Important Jewels Auction, sold for $320,000

Flawless

Internally flawless D colour, 3.15 carat

Internally flawless 3.15 carat emerald cut, D colour diamond ring, lot 420, in the Dupuis Fall 2015 Jewels Auction

Flawless

The word “flawless” means one thing.  “Flawless” indicates that an item is without imperfection or blemish. It conveys the impression of something very special, out of the ordinary.

Sports and Arts

Only the rarest of things is flawless. In the sports world, a baseball pitcher with a “perfect game”; not allowing any opponents to reach base has certainly done something flawless. In music, a singer hitting every note and conveying every emotion through an opera has perhaps given a flawless performance. In gems, flawless has a very particular meaning.

internally flawless 3.23 carat fancy intense yellow

Internally flawless 3.23 carat, fancy intense yellow diamond in a ring, Lot 419, in the Dupuis Fall 2015 Jewels Auction

Gems

Gems are traditionally examined under a standard ten times (10X) magnification. If a gem is examined under a microscope or with a jewellers “loupe” at 10X and absolutely nothing is found in that precious stone, then it is considered flawless.

Gems occur in nature and form under all sorts of conditions, and among all sorts of other gems and minerals. It is highly uncommon to find a gem that has no other crystals or other tiny features inside, these common features are called “inclusions”.

Often the inclusions in a gem are so tiny that you can only see them by using a microscope or jeweller’s loupe. Sometimes an inclusion may be large enough to see with the naked eye. As a gemologist, I find crystal and mineral inclusions fascinating, but while the big and interesting inclusions make a gem a curiosity to a gemologist, they do certainly decrease the value.

Internally flawless 1.12ct diamond

Internally flawless 1.12 carat fancy yellow diamond, lot 417 in the Dupuis Fall 2015 Jewels Auction

Diamonds

A flawless diamond is extremely unusual. Due to the conditions of the formation of these gems, it is extremely rare to find a gem that is considered “flawless”. Only occasionally will a diamond receive such a grade. It makes them particularly valuable.

An “internally flawless” gem has a total lack of internal features that might be seen under 10X magnification, but may have some very tiny surface feature that doesn’t enter into the gem at all.

In the Fall 2015 auction, we have a number of these important gems. It takes a long time to grade these gems, because you really have to be completely thorough in examining them to  ensure that they really are flawless. These have all received the grading through the independent and internationally recognized grading laboratory at Gemological Institute of America (GIA)  http://www.gia.edu