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NOT ALL THAT GLITTERS IS SYNTHETIC! 
May 01, 2005 - Apart from being, among other things, a gem among countries and the Holy Land, the Land of Israel must have the highest concentration in the world of “thought to be natural gems that are in fact synthetics or imitations”. This phenomenon encompasses gems in the hands of native Israelis as well as in the possession of new or old immigrants from all regions of the world. The stories attached to these supposed to be rare and valuable gems are startling.

In our European Gemological Center, we hear on almost a weekly basis stories along the lines of: “This is a rare gem that has been in my family for centuries” or “My great, great, great-grandfather sold two large factories in Persia and got this gem for it”. Sometimes we are flushed with immense excitement prior to opening the parcel in which these gems come when a customer describes to us a red diamond the size of his fingernail (and most have big fingernails) that has been in the possession of his family for generations, only to find out, a few minutes later, that he has a nice piece of garnet worth a few dollars...

Sometimes we end up with tears in our eyes when told a heartbreaking story of a family walking in the desert for months with a gem hidden in the children’s clothes - “a stone that was in the possession of a famous rabbi centuries ago”. We in the lab know that just by touching it we are going to be blessed forever, only to find out that the holy gem is a fairly newly cut (40-50 years old) synthetic Veneuil ruby worth nothing.

So you may ask yourselves: How come, after all these years that we have been in the gemology business and the thousands of imitations and synthetics that have passed through our hands we are always very excited every time we receive a phone call of such stories of gems.

Several years ago I received a call from an old lady who insisted on talking to me and only to me. She said that she had seen my two-volume book about gems in a shop and I probably understood gems well. I thanked her for the compliment and asked her if this was the only reason she was calling. She replied: “No, I have a green stone and red stone that my grandfather received when he sold his land and house in Russia many years ago” (sound familiar?)

When I asked her to come and have them checked in the lab she said she was too old to travel and that she hated Tel Aviv. I did not want to start explaining to her that we are actually situated in Ramat Gan (next to Tel Aviv) and asked her to describe the stones to me to which she said: “One is the size of an old half Israeli Shekel coin and the other is a bit larger. My father told me that his father said that one is “Smarugt” and the other “Rubit”, one changes color like a lizard and the other glitters like red clean glass on fire”. Anyone who knows the old Israeli coins realizes that the lady was talking about large gems, and anyone who knows anything about gems knows that she probably meant alexandrite and ruby. And anyone who knows about “glittering old clean red stones knows that they are for sure, glass or synthetics and since when can an alexandrite of this size be hidden in Israel, in an old lady’s home for so long?

I explained to her that the gems that she was describing were most likely to be imitations, because alexandrite and ruby of these sizes are so very rare and that I never leave the lab to check gems on house-calls. To which she replied: “Do you think my grandfather was an idiot?”. I ended up packing my microscope and small portable lab and visiting her little lovely house.

To cut a long story short. The “Smarugt” ended up to be a fantastic more than 20 carat natural alexandrite. And the ruby was a native cut Burmese ruby, natural and unheated. Two top quality gems.

When she asked me how much I thought they were worth and I told her, she was not amazed at all and although the gems were worth several times the price of her house she just looked at me and said: “I knew he was a clever man, now I can buy my grandson a flat.”

I have promised to her not to disclose to anybody the value of these gems. Curious readers should look into prices given for such gems in recent auctions if you are keen to know the value. And as for myself, I learnt again the first rule of gemology, not all that glitters is synthetic, and you really never know...

Regards

The GemEwizard

Copyright © IDEX

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THE ABUSE OF ALL THAT IS NATURAL 
Apr 01, 2005 - To me the word natural in gems is sacred. Ideally, it should refer only to natural gems that have not undergone any process other than cutting, polishing and cleaning. Yes, we have seen rubies heated for centuries, to remove “silk” and sometimes improve red color by removing blue components. Yes, we have seen almost milky white geoda sapphires from Sri Lanka and Madagascar (Andranandambo and Ilakaka), which on subjecting them to high temperature, using fairly simple ovens, turn some of them to a velvety blue. I can swallow my tongue and, pending a clear disclosure, consider these procedures as legitimate, for there is no additional material, which was added to the product; a process such as that may have occurred in nature. The end product may still be referred to (classified) as natural ruby or sapphire. And then came treatments with additives, all under high temperature, such as diffusion of material to the surface of the gem, adding glass and borax to features, cracks and cavities in the gem. But, every now and then, there comes a time where I know that we are on the verge of disaster in the gem world. Normally we are like players in some kind of a Greek tragedy, where our fate is sealed and we are doomed to a certain very bleak future. Such was the case with the Beryllium. Using light materials such as beryllium, to penetrate the material to produce amazing colors.

Some laboratories were quick to produce thousands of reports for beautiful Padparadcha.

Sapphires, not suspecting the obvious question of how come?

It shook the world of gems, it ruined the faith of some major consuming centers, which are refusing to use sapphires unless free of any treatment. It caused what I call, the ETQ or “excess time for questions” during sale times, when you or your sales person are spending time to explain that your gems are OK instead of concentrating on how beautiful they are. Such is the case now with the new corundum treatment. They take low quality rough semi opaque corundum, full of cracks, fissures and cavities, pre-clean the material from the material in the fissures and impregnate the cracks with lead and some silica. The effect is startling. Those opaque cracks allow the light to travel through the material resulting in a rubylike material, comparable to a ruby worth many folds the ugly rough it originated from. And then came certificates:

In the Bangkok fair a few days ago, I saw a certificate (which was part of a pile of fresh certificates) clearly stating that the stone was a natural ruby, natural corundum and as a comment in the bottom a mention to the effect that some glass (lead) has been found in features.

How far do we have to go with treatments in order to lose the magic word natural? Will a product made out of natural powdered corundum impregnated with glass and lead still be called natural ruby?

We are going way too far.

Well friends let’s clear things up.

A ruby is a natural red corundum with chromium and iron as the coloring elements.

It is not a treated corundum filled with lead. The product is not a natural ruby, it is not even a natural corundum. It should be properly called: treated corundum, impregnated by lead to create an imitation ruby.

Let us protect what is sacred and not abuse the word natural.

Let us protect natural with a separate natural certificate, which will look different from the treated gems certificate.

Let’s cherish those precious gems for that which sets them apart from the crowd - they are natural.

Regards

The GemEWizard

Copyright © IDEX

[ 1 comment ] ( 453 views )   |  permalink  |  related link  |   ( 3 / 1934 )

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