No, a jeweler cannot make a diamond from coal. Unless he has a gigantic press (high pressure, high temperature), a machine shop he can contract with and some knowledge of chemistry (or contracts with a chemist), he should leave the synthesis of diamonds to companies that do. You can't run out to the store and buy a press (with heaters) and the anvils and dies you'll need to synthesize diamonds. They are specialty items. Use the links below to learn more about this process.
The jeweler could be looking for a number of things, from clarity, inclusions and imperfections, to quality of cut, evidence of wear, laser engravings, possible treatments, quality of mounting, damage, optical phenomena typical of diamond simulants, or color. It's a bit like asking what an astronomer is looking for when he looks through a telescope.
Certainly! Even a small diamond is quite beautiful and valuable. It depends on the shape of a rough diamond, but you might expect to get a cut diamond of about .2 to .3 carats out of a .40 rough diamond.
Diamonds can be cut with a diamond bladed saw, or with a laser, or they can be cleaved with a hammer and chisel.
This would be available at any jeweler's supply store, search online for one near you, have you heard of google?
The best thing to do is take it to a reputable dealer in town, unless you have a great deal of experience in telling whether a diamond is genuine or not. Also, if you have a diamond that you KNOW is genuine, you can place both of them, side by side, on a black cloth & compare the 2. It is pretty obvious to the naked eye the difference when they are side by side - but if you are just looking at a single diamond, sometimes it can be tricky.
Take your black diamond to a jeweler and ask the jeweler to use the probe to verify that the diamond is a real diamond.
Coal+Pressure=Diamond
Coal+pressure=uncut diamond+tool=diamond
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Take your diamond to a jeweler who can test the stone to confirm that it is or is not a diamond.
Ask your local jeweler to help you obtain such a diamond.
Best practices dictate that you take your diamond ring to the jeweler and ask the jeweler if s/he is interested in buying it.
Visit your local jeweler and ask about the price of a diamond chip that the jeweler may have for sale. The transaction will not involve lots of money.
A diamond is valued by its cut, clarity, carat weight and colour. A local jeweler can show you stones in this category or refer you to a jeweler who can.
Yes, it's possible to create a diamond from coal by subjecting it to high pressure and temperature in a controlled laboratory environment. This process can mimic the conditions under which natural diamonds are formed, transforming the carbon in coal into a crystalline structure similar to that of a diamond.
Should is an interesting word, and in this context doesn't mean much, until you expand the context of the query. If the jeweler is proving that the diamond is not on the list of stolen diamonds -- those listed with serial numbers, then, yes: the jeweler should show you the serial number on a diamond. If the jeweler wants to prove that a serial number exists on a diamond -- it cannot be seen with the naked eye -- then, yes: the jeweler should show you the serial number on a diamond. Otherwise, the situation requires a context.
You can take your diamond to a local jeweler who can use a probe to help you figure out if the diamond is a real diamond.