The top lots at Christies sale of Important Jewels in London on 5 June

Leading jewellery expert Joanna Hardy previewed the pieces in Christie's annual sale of Important Jewels on 5 June in London. Here, she divulges her top lots.


Bringing the spring auction season to a close, Christie's London is hosting its annual sale of Important Jewels on 5 June 2013. Getting into the Great Gatsby spirit, a highlight of the sale is an exquisite selection of jewels from the 1920s: Art Deco earrings, pendants, diamonds and pearls that encapsulate this iconic period in jewellery design.

International jewellery expert and author Joanna Hardy has worked as an auctioneer, valued jewellery worldwide for one of the top auction houses and regularly appears on the BBC Antiques Roadshow. She visited Christie's London to preview the lots in the sale and has picked out her favourites.

Leading the sale is Lot 356, an important natural pearl necklace, circa 1925, composed of three graduated rows of natural saltwater pearls (estimate: £330,000 - £530,000). All the dealers are talking about this necklace because it incorporates so many natural pearls. I looked at the necklace in detail and noticed a difference in skintone between the pearls. Not all the pearls match in colour and lustre, which leads me to believe that this necklace is made up of two separate strands of pearls that have been restrung. Regardless, it is still a beautiful piece that will achieve a very good price. There are quite a few natural pearl necklaces in this auction, which is no surprise given that the market is very strong and demand is high.

Lot 361, an antique sapphire and diamond necklace, is another top lot (estimate: £140,000 - £160,000). It's a spectacularly showy piece, set with sapphires from Ceylon. Very impressive to look at, you wouldn't get these stones - big, light-blue sapphires - from any other mine. So indicative of Sri Lanka, the shade is very pleasing to the eye - a pastel blue that, worn against the skin, makes the colour appear more even.

I love Lot 341, a multi-gem and diamond clip brooch by Bulgari from the 1980s (estimate: £35,000 - £45,000). It looks like an ice-cream cone - the colours are so vibrant. It is beautifully made and so typical of Bulgari, which has always excelled in colour. Assuming all the stones are untreated, they are incredibly vivid. If it is a natural orange sapphire then this is a fabulous example. The stone has quite a few inclusions but that is all part of its character. Another exceptional piece of Bulgari is Lot 344. This rare diamond-set snake wristwatch is beautifully articulated and fits snugly on the arm. An iconic Bulgari design, it's the epitome of a watch as a jewel.

Lot 253, a pair of Art Deco ruby, demantoid garnet and diamond ear pendants, is my wild card (estimate: £4,000 - £6,000). Featuring carved gemstones - in keeping with the era - and the rare demantoid garnet stone, they are a little bit unusual. I think they will achieve considerably higher than their estimate.

Lot 23, a 19th century micromosaic parure, is my bargain of the sale (estimate: £13,000 - £17,000). When you study micromosaics such as these it feels like you're looking at an oil painting. The fact that they are made up of tiny glass tesserae is amazing. This is very typical of the 19th century, when the upper classes would head off on a grand tour of Europe and return with micromosaic plaques as souvenirs, which they would often have set into jewellery. The necklace is an exquisite piece, featuring doves and classical female figures. It would look fabulous with today's contemporary dress.                    

There are a lot of compacts in the sale, many from the 1920s and 30s, which is very timely since there is an exhibition that has just opened at Goldsmiths Hall in London devoted to bejewelled makeup boxes from the age of glamour (read about it here). Lot 203 is very interesting. I haven't heard of the designer, Ghiso, but this Art Deco vanity case is in really good condition for its age. As well as the front button there is also a button on the right-hand side that, when pressed, releases a second compartment designed to hold pressed powder. It's a beautiful object and charming piece - a steal if it goes for its estimate of £1,500 - £2,000.

Lot 190 is a stunning emerald and diamond brooch by Cartier, circa 1920, that is an impressive 9.1cm wide (estimate: £30,000 - £40,000).  I love the fact that it's different and not symmetrical, with the emerald offset to the left by a diamond on the right.

Finally, Lot 357 deserves a special mention. Donated on behalf of the designer Tito Pedrini to benefit The Guy's and St Thomas' Integrated Cancer Centre, this contemporary necklace is out of the ordinary, colourful and very bold (estimate: £10,000 - £20,000). You don't see pink opals very often. Originating from Mexico, many people are not familiar with them, but this piece is likely to do well because buyers are increasingly seeking out more unusual gemstones and being braver in their choices.