Tag Archives: nacre

N

Nacre

is composed of hexagonal platelets of aragonite ( a type of calcium carbonate) (in a crystalline form) and conchiolin (an organic protein substance which provides bonding). The specific lustre, iridescence, and colouring of nacre — and, therefore, of any pearl which it forms — depends on the number and thickness of the various layers, as well as on whether or not the layers overlap one another. A freshwater pearl is made up of many layers of nacre and no bead.


The layers of nacre can be clearly seen in this freshwater

solid nacre pearl which has split open

Natural

A pearl which is ‘wild’ ie one which has grown without any human activity or intervention is called a natural pearl. Natural pearls are very rare these days and so command high prices. There are still several wild colonies of freshwater mussels Margaritifera margaritifera in the UK and they are protected by law under the Wildlife and Countryside Act 1981. Selling a UK natural pearl needs a licence. These molluscs can live for over 100 years. The earliest reference in Britain to freshwater mussels is by Julius Caesar’s biographer, Suetonius, who stated that Caesar’s admiration of pearls was a reason for the first Roman invasion in 55BC.

Tahitian minimum nacre depth law scrapped

The law requiring a 0.8mm  minimum nacre depth requirement over 80% of the pearl surface  for all Tahitian pearls is being scrapped from next January.

The French Polynesia government and pearl producers have collaborated to bring in a new oversight regime for pearls which will bring in quotas for farms and lagoons to protect the environment and prevent over-intensive farming but which will allow all pearls to be sold commercially and exported – at the moment thin nacre pearls are destroyed. While some in the pearl business have already thrown up their hands and gone ‘waily-wail it’s all doomed’ I do feel that French Polynesia is to be congratulated for at least tackling their problem with a bold step, rather than shoving their heads more firmly into the ground, which is often the default setting of governments -and industry. What they are doing at the moment is not working post-recession.

Producers will still be able to apply to the government inspection service for their pearls to be x-rayed and certified and it is likely that this will continue for high grade pearls . Nacre depth is an indicator of good farming practice since there has been time and effort expended by the farmer.

multicoloured tahitians

Multicoloured and HUGE Tahitian pearls. The surfaces are a bit marked but the lustre and colour and size sort of cover that

But it does open the way for any old tat to flood onto the market. Indeed smuggled pearls (fairly easy to smuggle pearls really) already out there show thin to non-existant nacre, with the nucleus visible, with any old whatever used as the nucleus and with blinking (where the pearl, when rolled, seems to be blinking at you – due to the missing nacre)

The effect of this, at least in the short term is that, if you want decent pearls, more than ever you will need to trust your supplier, be it retailer, wholesaler or even farmer. Everywhere in the chain of supply there will be a divide into cheap old rubbish with a nacre depth of …well, a smear and high quality – good colour and lustre and thick nacre.

You buy wholesale and the lot will be all mixed up from several sources – who is to say which pearl has which certificate. Or select a single one – does the wholesaler photocopy the certificate for a single farm lot – if he indeed has one.. So x-ray and certify was great in theory but in practice…it was great in theory.

They are probably looking also at the Akoya market. You can have rubbish Akoya, even unto blinking, or you can have amazingly amazing pearls which require sunglasses they are so shiny. And you can also get a certificate for your high quality pearls. Or not.
And of course there is no way to tell, even if you have a certificate, that it actually applies to that pearl. There is some work being done on implanting a readable micro chip into each and every nucleus to enable real identification, But that will push up prices and who has a reader?

One excellent thing though is that, with the minimum nacre thickness over the nucleus rule going souffle Tahitians, grown in a way something similar to freshwater souffles and just as bg and with just such amazing lustre, will now become legally commercially available. Expect 20mm irregular shaped baroque Tahitians next year.

Pearl exports have plummeted:The latest figures from the Institute of French Polynesia statistics indicate that in April, exports of raw pearls fell sharply (65% in value).

lighter shades of tahitians were much more attractive than darks, which looked muddy

lighter shades of tahitians were much more attractive than darks, which looked muddy

Previously pearls which failed the x-ray assessment were destroyed by Marine and Mineral Resources Branch (DRMM) in the presence of pearl farmers. “We want to sell more beads,” said Baldassari Aline Bernard, president of the Professional Union of pearl producers. ” Before, there were stringent controls on the layer of the pearl and visually, that were really disadvantageous for producers and traders (…) It was becoming unbearable

Teva Rohfritsch, Minister of pearl farming, said that now pearl farmers can market according to their choices and their market strategies,

In reality once the pearls had entered the supply chain either legally after inspection or smuggling there was little beyond trust and expertise to guide a buyer. I’ve only once had a certificate for pearls and that was when I bought direct from Kamoka . And the system was obviously flawed as I could have photocopied the certificate and handed it out with any old pearls.

In the last few years, as the world has been in recession, Tahitian pearl farmers and wholesalers have been hit hard, especially with the ascendancy of high quality bead nucleated freshwater pearls from China, which give a lot of pearl for your £, compared to Tahitians and South Sea pearls. (although Chinese bead nucleated pearl farmers are closer to emulating white south sea pearls than Tahitians)

Tahtian Black Pearls - aka dyed freshwater pearls from China

Tahtian Black Pearls – aka dyed freshwater pearls from China

Pearlescence will still go for quality product. It will be interesting to see what happens next year. I suspect that a lot of rubbish will be marketed as ‘wow we have tahitian pearls at the price of freshwater’ when the reality is that the customer will be buying something with a smear of nacre. I can’t claim ‘no veneer in here’ because all bead nucleated pearls are veneered in reality, but Pearlescence tahitians will still be the best quality we can find for the price you want to pay.
This is good for the future of the industry. At least they are doing something to keep going. I met with a huge south sea firm in HK in march and the pearls they had were very nice, round of course and they had lots in the 10-12 white pairs range. They told me they had fabulous lustre and were $150 a pair or some such. As it happened I had just been to one of my wholesalers (this was a sale in a hotel suite) and had some 10 and 12mm white bead nucleated freshwaters. Whipped them out and they were aghast at the quality, after lengthy sneering at the whole concept of freshwater pearls. The freshwaters outshone their pearls and were $50 a pair. (prices not exact as going from memory). I asked them why would any customer of mine go for a pair of studs made from their pearls when they could pay a third….I agree some connoisseurs might and will but the average customer…nope
Chinese freshwaters are getting very close to a really good imitation of white south sea with that elusive satin lustre and also to gold. Golds are good when you look at one or two on their own but they have an ear-wax brown look en masse still (like the dyed SS themselves). I’ve seen lots of smaller dyed fresh which look close to peacock tahitian but no real attempts to make them imitate tahitian strands so far.
The whole pearl thing is in flux