Where can I get a 365 nm laser pointer? | 合法醫療器材資訊網

2013年5月8日—Ineeditforevaluatingdiamondsforfluorescence.Thestandardreferencewavelengthsinthediamondindustryare254nmand365nm.

As for the industry standard, thats really what Im trying to get away from. Right now the diamond industry is doing the same thing as the banking and mortgage industries before the recent financial meltdown. In 2005 the GIA (Gemological Institute of America) stopped filtering the UV from their grading lamps. Within a year all other major grading labs followed suit. The result is that 1/3 of all diamonds are now over-graded by up to 4 letter grades. That means the diamonds are overvalued by about 40%.

On the other side of the coin, theres a worldwide movement to try to do something about it. Before 2005 fluo...