By Rubina Posh January 12,2017
The more intense the colour of the diamond the rarer and more expensive it is.
A 1.01ct VS2 Cushion Cut Diamond graded as Natural Fancy Light Yellow was available on 8thDecember 2017 for around AUD$6,000
1.03ct IF Cushion Cut Diamond graded as Natural Fancy Vivid Yellow was available on 8th December 2017 for around AUD$25,000
The colour in natural Yellow Diamonds is caused by the presence of Nitrogen in its composition. The more Nitrogen the diamond has the stronger the yellow colour becomes.
Generally, the Yellow Diamond colour grading scale begins with the S-Z range incorporating the Fancy Light Yellow Diamonds. Any Yellow Diamonds that fall below the “Z” range are allocated into one of the five categories:
These are then further divided based on their secondary colours.
Other colours seen along with the main colour are known as secondary colours. If the secondary colour is rarer, then the diamond will be more expensive.
A Fancy Brownish Yellow is the least expensive, followed by a Fancy Greenish Yellow and then a Fancy Orangey Yellow as the most expensive.
Colourless diamonds are graded from D-Z facing down (flat side down) and looking through the side of the diamond. However, all fancy coloured diamonds including the yellow range are always graded face up (flat side up) using the 4c’s:
The 4C’s apply to all diamond varieties whether white/colourless or fancy coloured.
The following are taken into consideration when grading the colour:
Hue – the most noticeable colour present;
Saturation – how strong & vivid the colour &
Tone – how dark or light the colour of the diamond is.
Australia, Central Africa, Angola, Borneo, Brazil, Democratic Republic of Congo, and Sierra Leone are the biggest producers of yellow diamonds.
Canary yellow is another name for natural yellow diamonds. These are usually recognised because of their strong yellow colour.
Zimmi yellow is another name for natural yellow diamonds referring to the yellow diamonds that come from Sierra Leone.
Yellow Diamonds just like any of the other fancy coloured diamonds can be found in all shapes including: Asscher, Cushion, Heart, Marquise, Oval, Pear, Princess, Radiant and Round.