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  • Catalogue Essay

    This arresting fancy vivid yellow conjures up an image of a luscious drop of honey, sweet and rich in colour, under the radiant sun. This attractive yellow colour is what the trade would describe as ‘Zimmi’, a relatively modern term for yellow diamonds with an exceptional saturation of hue. Zimmi is a mining area located in Sierra Leone of Africa, known to produce the world’s best yellow diamonds. Recent research studies shown that many of the ‘Zimmi’ diamonds indeed fall into the Type Ib category, making up only 0.1% of natural diamonds. Nitrogen atoms are highly dispersed in Type Ib diamonds which give rise to a more intense and saturated yellow colour, however, the common diamond-forming environment does not favour this lattice structure. Nitrogen atoms tend to aggregate and a Type Ib diamond could easily be transformed into a Type Ia, losing its golden yellow colour.

    In addition to the captivating colour, this pear-shaped diamond also exhibits a pleasing and well-proportioned outline rarely seen in coloured diamonds of this size. In the elite world of gems, a yellow diamond as desirable as the Golden Drop is every collector’s dream.


A Very Rare and Fine Fancy Vivid Yellow Diamond and Diamond Ring

Size 5½

HK$5,500,000 - 6,500,000 

Sold for HK$5,740,000

Contact Specialist
Terry Chu
Head of Jewellery, Asia, Senior Director
+852 2318 2038

Jewels & Jadeite

Hong Kong Auction 27 November 2017