DIAMOND MICROCHIP TECHNOLOGY
Nov 15, 2008 Sedona Az Children's Immortality and Synthetic Diamonds Diamond Microchips CVD & HTHP Diamond Psychics Clarity
Thermal Conductivity Apollo diamond has been tested with thermal conductivities exceeding 3000 w/m K, almost double that of polycrystalline diamond, and exceeding the best mined diamond. Armed with inexpensive, mass-produced gems, two startups are launching an assault on the De Beers cartel. Next up: the computing industry. By Joshua Davis (DC PACVD)
Bryant Linares Aron Weingarten Aron Weingarten brings the yellow diamond up to the stainless steel jeweler's loupe he holds against his eye. We are in Antwerp, Belgium, in Weingarten's marbled and gilded living room on the edge of the city's gem district, the center of the diamond universe. Nearly 80 percent of the world's rough and polished diamonds move through the hands of Belgian gem traders like Weingarten, a dealer who wears the thick beard and black suit of the Hasidim.
David Clugston Yellow diamonds manufactured by Gemesis, the first company to market gem-quality synthetic stones. The largest grow to 3 carats.
"This is very rare stone," he says, almost to himself, in thickly accented English. "Yellow diamonds of this color are very hard to find. It is probably worth 10, maybe 15 thousand dollars." "I have two more exactly like it in my pocket," I tell him.
He puts the diamond down and looks at me seriously for the first time. I place the other two stones on the table. They are all the same color and size. To find three nearly identical yellow diamonds is like flipping a coin 10,000 times and never seeing tails.
"These are cubic zirconium?" Weingarten says without much hope. "No, they're real," I tell him. "But they were made by a machine in Florida for less than a hundred dollars."
Blue Diamonds
The New Diamond Age (continued) Diamonds Synthetic, Diamond Wedding Rings 14kt 18kt Diamond Clarity Engagement Rings
A few hours later, Clarke was looking at a blueprint for an 8,000-pound machine that used hydraulics and electricity to focus increasing amounts of pressure and heat on the core of a sphere. The device, he was told, re-created the conditions 100 miles below Earth's surface, where diamonds form. Put a sliver of a diamond in the core, inject some carbon, and voilଠa larger diamond will grow around the sliver.
Ian White: Apollo's Robert Linares, looking through a chemical deposition chamber. His patented method produces flawless crystals of diamond.
General Electric managed to do this in 1954 by using a 400-ton press to crush the hell out of carbon. GE's machine economically produced diamond dust for industrial uses, and by the early 1970s the company had even managed to manufacture stones as large as 2 carats. But that effort took so much time and electrical energy, it was more expensive than buying a mined diamond. The Russians claimed their machine was relatively cheap, took no more energy to run than a dozen lightbulbs, and would produce a 3-carat stone in a few days. And the General could have it for just $57,000.
Clarke was skeptical. On the long flight back to the States he tried to forget about the offer and sleep, but the light creeping through his window shade kept him awake. If this thing really could make a diamond, he thought, $57,000 isn't that much money. "Hell," he mused, "what could be more fun than trying to make diamonds?" By the time the plane touched down in New York, he'd decided to give it a shot.
Three months later, Clarke returned to Moscow. Bodyguards met him at the airport and took him to a warehouse outside the capital. In an unheated room in the middle of winter, he watched Nickolai Polushin - one of the original Siberian scientists - lift the top half of the machine's sphere. Polushin pulled out a small ceramic cube, smashed it with a hammer, and handed Clarke a small diamond. Everybody smiled. The General eventually ordered three machines and told Semenov to ship them to Florida.
But there were two immediate problems. First, nobody in the US knew how to run them. Clarke solved that by moving a crew of Russians to Florida. ("I felt myself all the time in a sauna," remembers Nickolay Patrin, who now lives full-time in Sarasota.) The second and more fundamental obstacle was that the Russians themselves had not yet mastered the process. In fact, the machines did not reliably produce diamonds.
The General and his newly minted Gemesis needed help. He turned to Iranian crystal expert Reza Abbaschian, head of the University of Florida's materials science department in Gainesville. Abbaschian agreed to try turning the Russians' hit-or-miss method into a rigorously controlled and more reliable technological process. With the aid of some graduate students, he ripped out the analog knobs and dials and installed a computer control system. They upgraded the power supply and methodically tracked the slightest variation in each diamond synthesis attempt. With more than 200 parameters to control, it was painstaking work, and by 1999 - three years after Gemesis was founded - the General needed another infusion of cash.
Abbaschian's efforts had produced some very high-quality stones. So Clarke flew to London to show off a batch to potential investors. Rather than simply present them as a pile of loose diamonds, he went to a jeweler in Hatton Garden, the city's diamond district, and asked if a few of his stones could be set in rings. The jeweler agreed, and Clarke returned to his hotel room at Claridge's. The phone rang. It was De Beers.
According to Clarke, a De Beers executive, James Evans Lombe, was tipped off about the synthetic diamonds within two hours of their arrival at the jeweler's. Lombe asked for a meeting with the General. The De Beers executive drove directly to Claridge's, and the two men sat down in the tearoom to the strains of a piano and violin duet.
De Beers refuses to comment on the meeting - or about anything for this story - but Clarke says he simply placed his diamonds on the table. "When I told him that we planned to set up a factory to mass-produce these, he turned white," the General recalls. "They knew about the technology, but they thought it would stay in Russia and that nobody would get it working right. By the end of the conversation, his hands were shaking."
But De Beers wasn't backing down. Throughout 2000, the cartel accelerated its Gem Defensive Programme, sending out its testing machines - dubbed DiamondSure and DiamondView - to the largest international gem labs. Traditionally, these labs analyzed and certified color, clarity, and size. Now they were being asked to distinguish between man-made and mined. The DiamondSure shines light through a stone and analyzes its refractory characteristics. If the gem comes up suspicious, it must be tested with the DiamondView, which uses ultraviolet light to reveal the crystal's internal structure. "Ideally the trade would like to have a simple instrument that could positively identify a diamond as natural or synthetic," De Beers scientists wrote in 1996, when the company unveiled plans to develop authentication devices. "Unfortunately, our research has led us to conclude that it is not feasible at this time to produce such an ideal instrument, inasmuch as synthetic diamonds are still diamonds physically and chemically."
In the summer of 2001, Abbaschian told the General that they were finally ready to mass-produce diamonds. There was one last decision to make. Each machine was capable of generating a 3-carat yellow stone every three days (colorless takes longer). Given their scarcity, the price per carat was much higher for yellow diamonds - so much higher, in fact, that only the very wealthy could afford them. Plus, colored diamonds have gotten hot in recent years. (J. Lo's engagement ring? Pink diamond.) Clarke decided that he'd make the biggest splash by bringing yellows to Middle America. He'd compete on both price - charging 10 to 50 percent less than naturals - and style. And, if he succeeded with the yellow stones, he could transition into colorless.
The diamond industry fought back. Early last year, De Beers began shipping improved, even more sensitive DiamondSure machines to labs around the world. Meanwhile, industry groups led by the Jewelers Vigilance Committee have pressured the Federal Trade Commission to force Gemesis to label its stones as synthetic.
The tussle goes to the heart of the marketing problem for Gemesis or any maker of synthetic gems: How will consumers feel about them? The mystique of natural diamonds is anything but rational. Part of the allure is their high cost and supposed rarity. Yet diamonds are plentiful - De Beers maintains vast stockpiles and tightly controls supply.
Clever marketing may bring buyers around to manufactured diamonds. After all, there's no chance that they are so-called blood diamonds - stones sold by African rebels to fund wars and revolutions. And they aren't under the thumb of an international cartel accused of buying off foreign governments, despoiling the environment, flouting antimonopoly laws, and exploiting mine workers.
In fact, Gemesis is developing a marketing campaign that portrays synthetics as superior to naturals. The General came up with a proposal to brand the company's diamonds "cultured" - a deliberate echo of the designation given to the wildly successful (and more valuable than natural) cultured pearl. In an ambiguous April 2001 ruling, the Federal Trade Commission said that it was "unfair or deceptive" to call a man-made diamond a "diamond," but offered no opinion on the question of calling it a "cultured diamond."
So, for now, Clarke is sticking with cultured. But in the end, he insists, it won't really matter. "If you give a woman a choice between a 2-carat stone and a 1-carat stone and everything else is the same, including the price, what's she gonna choose?" he demands. "Does she care if it's synthetic or not? Is anybody at a party going to walk up to her and ask, 'Is that synthetic?' There's no way in hell. So I'll bite your ass if she chooses the smaller one."
Wrong, says Jef Van Royen, a senior scientist at the Diamond High Council, the official representative of the diamond industry in Belgium. "If people really love each other, then they give each other the real stone," he says, during an interview at council headquarters on the Hoveniersstraat in Antwerp. "It is not a symbol of eternal love if it is something that was created last week." So goes the De Beers-backed line. And forget the cultured pearl comparison, Van Royen says. Man-made diamonds are more like synthetic emeralds, introduced in large quantities in the mid-'70s. At first, their price was very high, but then the gem labs discovered that the synthetics could be easily distinguished using a standard microscope. The price collapsed and is now less than 3 percent of naturals.
Van Royen is confident the council's lab can pick out synthetic stones. To test him, I ask him to look at a half-carat light yellow Gemesis diamond. A jovial, bearded man prone to nervous laughter, Van Royen takes the rock and peers at it through a 10X jewelers' loupe. "It is very pretty," he admits, giggling. "But so is cubic zirconium." Although Van Royen's lab is outfitted with DiamondSure and DiamondView machines (the Diamond High Council works closely with the Gem Defensive Programme), he instead puts the gem into a more elaborate piece of equipment - a Fourier transform infrared spectrometer that registers the diffusion of light through crystal. Above the machine hangs a large printout that shows six sets of graphs. Van Royen points to one with a distinctive spike toward the right end of the horizontal axis. "If it is synthetic, it should look like this," he says. Sure enough, the machine displays a graph just like the one Van Royen indicated.
But such high-end testing is far from the last word. Only a small percentage of larger diamonds are lab-certified - though the number seems to be growing as the industry becomes more aware of synthetics. Diamonds that are smaller than a fifth of a carat are almost never sent to labs, since the cost would eat up any profit made from them. These modest stones actually represent a significant portion of the market, since jewelry designers regularly use them to create sparkling fields of diamonds on watches, earrings, rings, and pendants. Almost all diamonds of this size are bought, processed, and sold by Indians based in Antwerp and Bombay.
One such group - headed by the Choksi family - bought a $35,000 batch of preliminary Gemesis research stones last year and is currently selling them in India at a 10 to 20 percent profit. I met Sabin Choksi, one of the company's principals, at a jewelry convention in Las Vegas. He admitted that his customers don't know the stones are synthetic, but says they don't care one way or the other. In other words, Gemesis may be fully disclosing the nature of its stones, but already one of its wholesalers is not.
In Antwerp, Van Royen tells me of another threat. There's a rumor of a new, experimental method for growing gem-quality diamonds. The process - chemical vapor deposition - has been used for more than a decade to cover relatively large surfaces with microscopic diamond crystals. The technique transforms carbon into a plasma, which then precipitates onto a substrate as diamond. The problem with the technology has always been that no one could figure out how to grow a single crystal using the method. At least until now, Van Royen says. Apollo Diamond, a shadowy company in Boston, is rumored to be sitting on a single-crystal breakthrough. If true, it represents a new challenge to the industry, since CVD diamonds could conceivably be grown in large bricks that, when cut and polished, would be indistinguishable from natural diamonds. "But nobody has seen them in Antwerp," Van Royen says. "So we don't even know if they are for real."
I take a transparent 35-millimeter film canister from my pocket and put it on the table. Two small diamonds are cushioned on cotton balls inside. "Believe me," I say, "they're for real."
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