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Hundreds of radioactive gems circulating in Thailand & region
BANGKOK. Nov 12: Hundreds of dangerously radioactive gems arc circulating in Thailand. .Hong Kong. Japan and possibly Europe, a gemologist said Wednesday, reports AP.
"When we first tested one with a geiger counter, it pushed the needle off the dial," said Ken Scarratt, president of the Bangkok Center for Gemstone Testing, a laboratory that examines gems of all types in Bangkok.
The dangerous gems, which can cause skin cancer and other types of cancer, are of a single type, known as a cat's eye, and are part of the chrysoberyl family of stones.
Dealers around the world, jewelry trade associations and the Thal authorities were immediately alerted to the problem. Scarratt said.
Authorities in Hong Kong and Indonesia have reported they have already found some of the radioactive gems.
Tests done at the Office of Atomic Energy for Peace in Thailand showed the stones
have a radioactive level of 52 nanoCuries per gram, more than fifty times the 1.0 nanoCurie per gram limit accepted as safe in the United States.
A 2.0 nanoCurie level is acceptable in Asia.
Scarratt said that although he lacked conclusive evidence, he believed the stones had come from Indonesia, where they were bombarded with radiation in a nuclear reactor to change their colour. The dangerous stones are dark brown, whereas normal cat's eyes are a pale yellow. The dark brown variety can fetch enormous prices from buyers, Scarratt said, which is why they were treated with radiation to change their colour from pale yellow.
They're much rarer than diamonds or rubies." he said.
The gems they start with are not usually the highest quality, but by irradiating them to change their colour, the dealer can get five or ten times the price he would have gotten for them in their normal state," said Tom Banker, managing director of
GemEssence, a Jewelry company in Bangkok.
He said top quality chocolatecolored cat's eyes can get as much a thousand dollars a carat wholesale, and twice that retail.
The irradiated gems would be especially dangerous to any gem finishers who unknowingly cut particles in the residual dust.
Consumers should avoid buying dark brown cat's eyes, or if they can't resist, have the stone tested first, Scarratt said.
He added that, although they are extremely dangerous now, after two or three years the radioactivity would naturally reduce to a level that would be safe.
Scarratt said he didn't expect the scare would hurt the Thai Bem and Jewelry industry, which • one the country's top ten exports, as the dangerous stones werejust one type.
Thailand has emerged as a high-quality finishing center for DeBeers diamonds and rubies and sapphires mined in Thailand and neighboring Cambodia and Myanmar.