You don't use a jewelers loupe with a customer. You use it with a gemstone. Closely inspecting your customer with a magnifying lens will very quickly result in an ex-customer... and perhaps an assault charge.
A loupe with 10x magnification and triplet magnifiers is the best for viewing diamonds. It is also best to get a loupe with a black casing or body that surrounds the lens, as black will prevent distortion of the color and the object being viewed.
Jewelry professionals use a magnifier, also called a loupe (pronounced loop), to inspect gemstones and other jewelry. These magnifying loupes have special lenses that allow our eyes to focus on an object at a much closer distance than is normally possible, making the object appear to be larger and revealing tiny details we couldn't see with our normal vision
There are thousands of tests you can do to find out the difference between cz and diamonds. If you put the gem near your mouth and breath on it, if it takes about 2-5 seconds to defog, then it is most likely cz, but sometimes jewelers put a layer of diamond around cz so it will defog instantly. You can also take the gem, place it upside down on a newspaper, if you can see the writing or anything close to it, it is fake. You can also use a jewelers loupe, cz under a loupe is flawless, diamond has very flaws that you can see. I hope this was helpful.
Most jewelers use a commonly available 10x loop to look closely at a stone. A gemologist or someone cutting a stone would probably use a higher magnification. The best loop is one that gives you the field of vision that you need to inspect a diamond.
It is possible to use 10x instead of thanks in the internet community. The phrase 10x is considered internet slang. One could also use 10x in text messages they send to friends. When asked, one may want to explain what 10x means.
Yes
Jewelers screwdrivers are very small examples of normal screwdrivers, watchmakers use them too.
A gemologist will use a probe and a loupe.
10X
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Some people use a magnifying glass called a loupe.
The derivative of 10x with respect to x is 10 and 25y with respect to y is 25. If it is 10x25y, then use the chain rule. 10x 25y = 10*25y + 10x*25y' = 250y + 250xy'