At present, more than half of the companies in the auction industry collect huge upfront fees by estimating the price of your lot, so as long as the company collects upfront fees, it is safest not to send the lot. Paid the upfront fee, and if the auction fails, the money will be gone. If the upfront expenses exceed10 million, it is usually a company, and its purpose is to collect upfront expenses to make money.
Ruby AIG certificate standard:
There is no need to worry about professionalism, because the current jewelry appraisal institutions mainly rely on machines, that is, spectrometers, rather than people themselves, as long as the spectrum of the identified gems matches the spectrum of the database. As for the chroma of the colorful treasure, it is also comparable to the colorful card. Whether it is burned or not can be determined by looking at the color diffusion characteristics inside the gem with a magnifying glass.