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sterling silver jewelry making supplies wholesale 10 times magnifying glass, spotlight to observe jewelry

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Regarding the magnification of a magnifying glass for jewelry, some people think that the bigger the better, in fact it is not, because in terms of lens production, it exceeds 10 times and can guarantee its optical quality and clear aperture (the clear aperture of the magnifying glass is 16-20mm) Appropriate) is very difficult; secondly, a magnifying glass over 10x is difficult to use because the focal length is too short. When using a 10x magnifier, the distance between the fixed object and the top of the lens is about 25mm, which is the most appropriate distance; if a 20x magnifier is used, the distance between the object and the lens is only 10mm, which is very inconvenient to observe. In view of the above reasons, the jewelry industry uses a 10x magnifying glass to observe jewelry. Ví dụ, if you observe red, sapphire and jade jade bracelets with a magnifying glass of 10 times, the jewelry is considered to be free of cracks, but the buyer later looks at the jewelry with a magnifying glass of 20 times and finds that the jewelry has fine cracks or jade patterns. The seller can consider the jewelry There is no problem. Because as the magnifying glass increases, the fine cracks or jade patterns that are not a problem will also be revealed, especially for some jade articles.

Why is the convergent light bulb an essential tool for identifying gems and jade?

Because the light of the condenser is bright and concentrated, it can be irradiated from the front of the jewellery and jade to check its luster. It can also be irradiated from the back of the jewellery to check whether the inspected object is transparent, cracks and blemishes. Especially when buying high-end jade bracelets, red and sapphire rings and other ornaments, the value of whether there are cracks varies greatly.

Ngoài ra, when using the Charles mirror to check whether the jade is “C Hàng hóa”, the strong light of the condenser must also be used to illuminate the surface of the jade so that the Charles mirror can see clearly. Vì thế, the spotlight is an essential tool for identifying or observing jewelry and jade.

 

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