Rare Gold, Sapphire, Diamond and Emerald Bird Brooch by Pierre Sterlé
This extremely rare Sterlé pin is a one of a kind creation by the legendary French jewellery designer. Made out of 18 karat gold set with diamonds in the beak, the neck and the tail, with a twin-leaf carved heart-shaped emerald for the body and a large 9.9 carat Burma (no heat) sapphire creating the head. Circa 1960s. Burma sapphire certified by SSEF Report No. 69429 Basel, 23 August 2013.
Burmese sapphires are considered of very high quality, and as such are valuable. Careful examination under a microscope is the simplest way of deciphering whether a sapphire is Burmese, as their inclusions are unique to them. While Sri Lankan needles tend to be longer, often spanning the width of the stone all together, Burmese inclusions form delicate clusters. They are usually a denser blue than the watery Sri Lankans, with those of particularly excellent quality resembling Kashmir stones in colour, with the added benefit of being easier to find in larger sizes. Indeed, one Victorian diplomat returned from Burma with a 907 carat sapphire in hand. In some cases, the geographical environment of a Burmese sapphire might infuse it with iron-rich rutiles, which add a brown silk to them.
See more jewellery by Pierre Sterlé here.