Thursday, 16 August 2018

Chameleon Diamonds

The rarity of chameleon diamonds is due to their unusual ability to change color temporarily when heated to about 150°C, or after prolonged storage in the dark.

Chameleon diamonds will show different colors if observed under halogen light, incandescent light and daylight. If Chameleon diamonds are exposed to heat they can change to a greenish-yellowish color very quickly and when they cool down and stabilize their normal color will return; this is known as thermochroism.
With all natural fancy color diamonds, an element other than carbon has made its way into the diamond which results in a new color.
In the case of Chameleon diamonds, an excess of hydrogen and a small amount of nitrogen has entered the diamond and this creates the unique colour-changing property. Most Chameleon Diamonds return to a green shade after exposure to heat or light. These diamonds usually fluoresce yellow. They often take on a strong red glow when they are being polished.
The Chopard Chameleon Diamond is a 31.32 carat oval-cut chameleon diamond and the largest known.
8.04 carat radiant cut “fancy dark grey green chameleon”. It is valued at $2,100,000

0.49 Carat VS1 Pear Shape Fancy Dark Chameleon Diamond

0.50 Carat Cushion Fancy Deep Chameleon Diamond

0.52 carat Fancy Deep brownish Greenish-Yellow Chameleon diamond.

Tuesday, 14 August 2018

The Treasure of San Gennaro

Januarius was Bishop of Naples, and is a martyr saint of the Roman Catholic and the Eastern Orthodox Churches.

The Treasure of San Gennaro contains a selection of the most important works donated to Saint Januarius by over 700 years of Popes, Emperors, and European Kings. The works have the highest artistic value: they were made using a huge number of precious stones, by the most eminent goldsmiths of the time.
Januarius is the patron saint of Naples, where the faithful gather three times a year in Naples Cathedral. Saint Januarius is famous for the miracle of the annual liquefaction of his blood, which, according to legend, was saved by a woman just after the saint's death.
Two major masterpieces of the treasure are the Collana di san Gennaro (Saint Januarius’ necklace) and the famous Mitra (Mitre) made of silver and precious stones.

A total of over 22,000 pieces make up the entire collection.

Monday, 13 August 2018

'Hero' Diamonds from the 2018 Rio Tinto tender

Square-radiant-shaped, 1.29-carat, fancy vivid purplish-pink Argyle MaestroRio Tinto's Arglye mine in Australia is heading for closure in 2020 and this will be one of the last tenders.
Headliner is the Argyle Alpha vivid pink diamond, weighing 3.14 carats.
1.57-carat, fancy dark grey-violet Argyle Alchemy
1.12-carat fancy red radiant-shaped Argyle Mira2.28-carat oval purplish-red Argyle Muse2.08-carat round brilliant-shaped Fancy Intense Pink Argyle Odyssey

Sunday, 12 August 2018

Amazing Cartier

Beautiful by the designs of Cartier. Since the 1930's, the fine jewelry house has been creating whimsical and extraordinary pieces.

Saturday, 11 August 2018

Sotheby’s: “Royal Jewels from the Bourbon Parma Family”

On Nov 12, Sotheby’s will hold its “Royal Jewels from the Bourbon Parma Family” auction. The royal jewelry includes pieces from several centuries of European dynasties. Marie Antoinette, Louis XVI and their children were imprisoned and the two were subsequently beheaded in 1793. Their son died in prison and daughter was released after several years and fled to Austria, where she received her mother’s gems.

From then on, they were passed on through generations of royal bloodlines.
In addition to Marie Antoinette’s jewels, there are a host of gems previously owned by King Charles X of France. The Bourbon-Parma family is a bloodline of rulers that ranges from the Bourbons to the Habsburgs and includes Kings of France, Spain, and Austria.