|Opal Brooch set with Emeralds and Sapphires, 1910|
|Opal bracelet, 1910's. Princess Ceril of Siam|
|Opal brooch, 1910's. Princess Ceril of Siam|
|Opal necklace and pendant, 1890's. Princess Ceril of Siam|
Sotheby's London will auction on July 11th a small collection of jewels formerly in the collection of Princess Ceril, amongst them there are a number of extraordinary pieces set in blue and green opals.