Tuesday, 27 April 2021

Orange Diamonds

The largest fancy-vivid orange diamond known to exist sold for 32.6 million Swiss francs ($36 million) at Christie’s International in Geneva in late 2013.

The 14.82-carat pear-shaped stone’s price was about $2.4 million per carat, this was a per-carat record for any colored diamond at a public sale. The gem also set a record for an orange diamond of its type.
Light Orange, Fancy, Fancy Intense Orange, Fancy Vivid Orange and Fancy Deep Orange

Orange Diamonds may contain a brown, yellow or pinkish modifying color.
Pure Orange diamonds are impossibly rare. Most diamonds contain some nitrogen. In orange diamonds the nitrogen atoms have grouped themselves in a very specific way. This happens during and right after the diamond is formed. Nitrogen arrangements absorb light in the blue and yellow region of the spectrum producing an orange color.
The strength of colour is one of the most important factors in determining the value of a natural color diamond. The value increases exponentially with the intensity of the most prominent colour within the diamond.
A 4.08-Carat Fancy Vivid Orange Diamond Ring blew past it's US$1.6 – 1.8 million estimate at Sotheby's Hong Kong auction in April 2016, bringing $ 2.3m

The 'Mandarin Orange' is a 4.19-Carat Fancy Vivid Orange Diamond. It sold for $2.9 million in 2011.
The Pumpkin Diamond is 5.54 carats and rated as Fancy Vivid Orange by the GIA. Halle Berry wore the ring to the 2002 Oscars where she won the Academy Award for Best Actress for her role in Monster's Ball. The popularity of orange diamonds zoomed.

2.00-carat, fancy vivid orange, heart-shaped Lady Orquidea Diamond
50.34 carat marquise-shaped Natural Fancy Deep Brown-Orange diamond. $1.1m.

Fancy Vivid Orange Yellow & Fancy Brown Orange Pink IF Pear Shape Diamond TW 10.62cts.

Wednesday, 21 April 2021

Red Diamonds

Pure red diamonds devoid of secondary hues are the rarest in the world. Less than 30 certified red diamonds are known to exist. The Argyle Diamond Mine is the only known significant source of pink and red diamonds, producing over 95% of the world's supply. In the last 30 years of mining, Argyle has found a total of 14 pure red diamonds.

Red diamonds are so rare that there is little gemological information about them. What is known is that crystal lattice defects showing stress lamination during the diamond's formation are the cause of the red color.
The largest red diamond known is the Moussaieff Red. The 5.11-carat trilliant-cut stone was discovered in Brazil in the 1990s and weighed 13.90 carats rough. It sold for $8 million at auction in 2001.

It was discovered by a Brazilian farmer in the Abaetezinho river, in a region known as Alto Paranaiba.
The Kazanjian Red Diamond is 5.05-carats, emerald-cut. The gem was discovered in the 1920s in Litchenburg, South Africa.

It was 35 carats uncut. A diamond broker paid eight pounds per carat.
The De Young Red is 5.03 carats and graded as Fancy Brownish Red. It was found in South Africa in 1927. The stone was once mistakenly sold as a red garnet and was set in a hat pin.

Eventually the garnet was proven to be a diamond. It currently resides at the Smithsonian.
The Rob Red Diamond is modest in size at 0.59 carats but it holds a special place in the diamond world. The Rob Red is rated as the most intense red diamond ever discovered. The diamond is rated fancy purplish red by the GIA. The diamond is VS-1 clarity, pear-shaped.

The Supreme Purple Star is an enigma. It surfaced in London in 2002. Rotating the diamond while viewing it, it goes from a deep purple to a vivid purplish red, making it unlike any other seen before. It's whereabouts is unknown.

Sunday, 18 April 2021

Melo pearl

Melo pearls are large and non-nacreous, and are found naturally in the Melo Melo sea snail. Pearls fall into one of two varieties, nacreous and non-nacreous. Nacreous pearls are formed out of the material nacre and generally have a high luster. Non-nacreous pearls are generally less valuable with some exceptions. Melo pearls are one.
Most pearls in jewelry are cultured by farmers under controlled conditions, but there are some natural pearls whose origins can’t be created. The Melo Melo pearl is among them, making them extremely valuable. Melo Melo pearls can take decades to grow to significant size.
The Melo Melo is found in Southeast Asia, Burma, Thailand, Malaysia, the South China Sea and the Philippines.