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Nature's Brilliant Colours
Newsletter No. 8 09/2011
Kulsen & Hennig News
Ready to go for the Autumn!
We are back from the summer break, rested and ready to go for the coming autumn season. We would like to thank you for your understanding and your patience during the summer and are looking forward to assisting you in any way we can as you prepare for the Christmas sales season.

This 8th edition of our newsletter will allow you to be even better prepared to advise your customers. Whether it is the subject of the particularities of blue diamonds, fluorescence in general, or completing your specialist’s library, we hope that this newsletter will bring you many new impressions.

We would also like to take this opportunity to introduce our new colleague, Ms Susanne Noell, who is enjoying her new position. She has already begun assisting Ms Hennig and Mr Kulsen in their daily activities. Ms Gollwitzer is currently on maternity leave and we wish her all the best!

Warm Regards,

Juliane Hennig

From Our Collection:
A Pear Shaped Fancy Intense Purple Pink 0.57 ct Diamond
Today, we are presenting a very valuable diamond. Its colour has been described as Purple Pink which means that this stone, when compared to a pure pink stone, presents an additional berry tone.

The add-on “Fancy Intense” indicates strong colour intensity and makes the stone even more valuable.The slight inclusions do not reduce the stone’s clarity and are absolutely forgivable when one considers that pink stones, by their very nature, often have more inclusions than other diamonds.

If you are interested in this stone, please contact us by email or by telephone at:

Telephone: +49 (0)30 44 34 17 77

All about Natural Coloured Diamonds
Correction: Error in Our Last Newsletter
An attentive reader kindly reported an error in our last newsletter. In the article “Test Your Knowledge of Coloured Diamonds”, question 4 should have read

“The term ‘Fancy’ (and not ‘Fancy Pink’) is only obtained by approximately one diamond out of …..”.

Hence, 4c (“100.000 gem quality diamonds”) was the correct response.
Recommended Reading
Stephen C. Hofer: Collecting and Classifying Coloured Diamonds
Stephen C. Hofer’s study deserves the term of “major work” and his
742 page book, weighing in at 4 kilos, can, without question, be called
a “tome”.

If you want to know everything, absolutely everything, about coloured diamonds; if you attach as much importance to a work’s overall presentation as to its content, then we whole-heartily recommend this classic.
The Aurora Pyramid of Hope – The Coloured Diamond Collection at the Natural History Museum in London
When you consider that only one out of about 100.000 gem quality diamonds possesses a Fancy colour grading, it is easy to imagine not only the value of this famous collection, with its 296 natural coloured diamonds, but also its importance to science.

Alan Bronstein and Harry Rodman’s Aurora Pyramid of Hope is currently on display at the Natural History Museum in London, in The Vault, the museum’s new mineralogy gallery opened in 2007. Finally, an opportunity to admire this exceptional collection in Europe!

Our article will examine what the Pyramid of Hope can teach us about buying and selling coloured diamond and just about everything else you should know on the subject.
Gemmology Corner
Diamond Colours: Blue
If there is one diamond colour that is well known, it is definitely blue, thanks to the Hope and Wittelsbach-Graff diamonds, two of the most famous diamonds in the world.

In fact, by their very nature, blue diamonds are actually among the rarest of all precious stones. As with all Natural Fancy Coloured Diamonds, the clarity and colour intensity are deciding factors in determining the value of blue diamonds.

What particularities should be observed in the colour graduations of blue diamonds? Why are they so rare? What characteristics make them so interesting for researchers?

All about Fluorescence – Questions and Answers
Confusing two similar diamonds could prove to be not only an unpleasant experience but also an expensive one! Luckily, dimensions and weight are easy to verify quickly, excluding any chance of error.

Diamond certificates clearly identify a diamond by indicating its colour, clarity, proportions, and degree of fluorescence. Would you know how to explain to your customer why his diamond is able to glow?

Maybe you know the impact of fluorescence on the price of a white diamond, but do you know that the same is true for coloured diamonds?
You will receive our next newsletter end of 2011.
Earlier editions of our newsletter may be found in our newsletter archive.
KULSEN & HENNIG GbR I PO Box 040114 I DE-10061 Berlin I T +49 (0)30 44 34 17 77 I