Diamond Brooch. Estimate 3,000,000 — 4,000,000 HKD (337,974 - 450,632 EUR). Photo Sotheby's

Of cluster design, set with nine marquise-shaped and eight pear-shaped diamonds together weighing 31.34 carats, mounted in platinum. 

Accompanied by seventeen GIA reports, stating that the seventeen diamonds ranging from 3.57 to 1.01 carats are D to F colour, Internally Flawless to VVS2 clarity. 

Please note that the certificates are more than 10 years old and might require an update. 

Sotheby's. Magnificent Jewels & Jadeite, Hong Kong, 06 avr. 2015, 01:00 PM