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Author: The Pearl Market
Dear Pearl Market,
I've inherited a pearl necklace which belonged to my grandmother. It has about sixty pearls on it and what I think is a gold clasp. There isn't a box or a certificate with them. Most of the pearls seem in good condition although a few appear a bit yellow coloured. Can you give me an idea what the value of the necklace might be?
Sadly, there's bad news and then there's more bad news...
The bad news is that the majority of inherited pearls turn out to be imitation. A generation or two ago most people couldn't afford real pearls, so they wore fakes.
The more bad news is that it doesn't matter! With some exceptions, old pearls usually aren't worth much anyway. Lets explore this further...
From a description alone it's not possible to say with certainty whether a necklace is real or imitation. Even with a photograph. But there are clues:
Get out your ruler and measure the diameter of the largest pearls on the necklace. In the 1950's, 60's and 70's a typical size for cultured pearls was 4mm to 6mm. Graduated necklaces were popular - ranging from a central 7mm diameter pearl to 3mm pearls at the necklace ends. A necklace from this era with large pearls was either fake or vastly expensive. Was grandma very wealthy?
Pearl culturing and processing has come a long way in the last twenty years but pearls are still a natural product, often slightly off-round with small imperfections visible on the surface. Imitation pearls are usually perfectly round and flawless. Ironically, the better grandma's pearls look, the more likely it is they aren't real.
Tricky one this because it's far from conclusive. Fake pearls are sometimes slightly or more-than-slightly yellow. Unfortunately, if real pearls are kept in a dark box for a long time they can become dry and yellowish too. Cream is a natural colour for many pearls.
Clasp and Thread
If grandma's necklace is genuine it probably has a decent clasp fitted - not a cheap silver, paste or gold-plated filigree clasp like this.
Real pearls would have been strung on silk thread and knotted between each pearl to stop them rubbing together and protect against breakage. Stringing on cotton or twine with or without knots isn't a good omen.
It's often assumed that because something's old it must be valuable. That's rarely true and certainly not for pearls. Advances in technology and culturing techniques mean you can buy a much better set of pearls for far less money than in grandma's time.
Even if they're real and cost a fortune in their day, second-hand pearls aren't worth much unless there's something special about them - like if they're wild pearls, were owned by someone famous or have a unique and interesting history.
Jackie Kennedy's much-loved triple strand of glass pearls went for over US$200,000 at auction in 1996. An identical replica set can be had for only US$99!
In 1917 jeweller Pierre Cartier bought his company's Fifth Avenue headquarters in New York with $100 in cash and a two-strand natural pearl necklace valued at US$1 million. In 1957 the same necklace was auctioned for just US$157,000.
Do remember that there can be a big difference between resale value and replacement value. If you are looking to insure your pearls you'll need to do a bit of research or get a valuation from a jeweller to find out how much it would cost to replace them if lost.
imitation pearlsGo by many names like simulated, organic, faux and semi-cultured. Good imitations are made from beads of glass, ceramic or shell and coated with a varnish of laquer and ground fish scales to mimic the pearl surface.
Well made imitations can be quite hard to spot. One way is the 'tooth test'. Gently rub the pearl under the cutting edge of your top front teeth. Don't bite it.
A real pearl should feel slightly gritty due to it's crystaline structure. An imitation pearl will feel smooth. This is not an infallible test.
Here's an example of an imitation necklace. Note the very large perfectly formed pearls and cheap clasp.
If this was a real pearl necklace it would be worth a fortune!
Are rare but can still be found
Wild pearls are more likely to look like these baroque pearls than today's round pearls. Wild pearls are valuable but don't get too excited. It's much more likely your inherited pearls are baroque cultured pearls than wild pearls.
If you really do think you have a strand of wild pearls and want to sell them you'll need to get them X-rayed, authenticated, and certified by a gemological laboratory. Then you can approach an international auction house like Bonhams for an estimated auction value.
selling your pearlsThe sad reality is that old, second-hand cultured pearls aren't worth a lot. There's no obvious place to sell them and you won't get much from a jeweller or by putting them on eBay.
Our advice is to keep them as a momento or give them to someone who'll appreciate them. Remember though that a once-expensive necklace may have a still valuable clasp.
The Pearl Market Limited, Drefach Felindre, Llandysul, Carmarthenshire SA44 5YW
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