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Cyclotroned diamonds have a green to blue-green color confined to the surface layer: they are later annealed to 800 °C to produce a yellow or orange color. They remain radioactive for only a few hours after treatment, and due to the directional nature of the treatment and the cut of the stones, the color is imparted in discrete zones.
Gemstone irradiation is a process in which a gemstone is exposed to artificial radiation in order to enhance its optical properties.High levels of ionizing radiation can change the atomic structure of the gemstone's crystal lattice, which in turn alters the optical properties within it. [1]
Scams and confidence tricks are difficult to classify, because they change often and often contain elements of more than one type. Throughout this list, the perpetrator of the confidence trick is called the "con artist" or simply "artist", and the intended victim is the "mark".
Now, the Better Business Bureau is issuing an alert about a scam consumer protection experts are hearing about almost every day. Scammers 'accidentally' sending money, experts say don't send it ...
The Wisconsin Department of Agriculture, Trade and Consumer Protection fielded over 10,000 consumer complaints in 2023, leading to settlements of over $3.3 million, according to a news release.
Diamond reports from GIA (as well as other, for-profit sources) are now demanded by most consumers purchasing diamonds over a certain size, typically for over 0.5 carat (100 mg), and almost always for over 1.0 carat (200 mg), and are considered an important tool in guaranteeing that a diamond is accurately represented to a potential buyer.
The government of the Central African Republic suspended a Chinese mining company’s operations in the country, accusing it of cooperating with armed militias, a government decree said. The ...
The De Beers diamonds antitrust class action sought to end an alleged 60-year conspiracy to fix the price of rough diamonds in the U.S. by the De Beers group of companies. The litigation includes several cases including Hopkins v. De Beers Centenary A.G., et al., No. CGC-04-432954, which commenced on July 24, 2004, and Sullivan v.