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One old-time method of determining if a diamond is real is by trying to scratch glass, such as a mirror, with it; if the gem scratches the glass without being damaged itself, it was considered to be a diamond. This method, though, may fall short with modern materials that are harder than glass, but softer than diamond.

Jewelers and pawn shops can purchase a device with a single needle that, when placed on the diamond, can determine whether a diamond is real. I don't know how this device works, other than the needle gets hot quickly.

Another Answer

A diamond conducts heat, and the probe determines whether or not the stone is a diamond. Some more sophisticated probes can also determine the difference between diamond and moissanite, a crystallized silicon carbide that closely resembles diamond and often fools novice jewelers.

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Q: How do you determine if a diamond is real?
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Related questions

What is the tool to determine if a diamond is real?

The tool is named diamond probe.


What are some ways to check if a diamond is real?

Take your diamond to a jeweler, who will use a probe to determine whether or not the stone is a real diamond.


How do you tell a real diamond from manmade?

A certified gemologist can determine whether your diamond is a natural diamond or a lab-created diamond.


How do you tell if diamond is real?

If you shine it in the sun and it shines very bright it is realAnother AnswerTake your diamond to a local jeweler who can use a probe to determine whether or not your diamond is a real diamond.


How do you tell if a diamond is real?

If you shine it in the sun and it shines very bright it is realAnother AnswerTake your diamond to a local jeweler who can use a probe to determine whether or not your diamond is a real diamond.


Is your raw diamond real?

Maybe. Your local jeweler can apply a probe to it, to determine whether or not it is a diamond stone.


How do you tell if you have real diamond?

Take your stone to a local jeweler who can use a probe to determine whether or not your gem is a diamond.


How can you tell if a diamond is real?

Ask a jewelerTake your stone to a local jeweler who can use a probe to determine whether or not what you have is a real diamond.hit it with a hammer. if it doesnt break, its diamond


Are American diamond real?

A jeweler can help you determine whether or not your diamond is real, using a probe. Adding the word American as a modifier to the noun diamond, gives zero indication as to the authenticity of the stone in question.


What is economic worth of a synthetic diamond?

The value of a synthetic diamond is not as easy to determine as that of a real diamond. It's value may be exactly what a buyer will pay you for the stone.


Is 0.19 ct diamond real diamond?

It is entirely possible. the carat only tells you the size of the diamond. You will need to bring it to a professional jeweler to determine its authenticity.


Is there an easy way to tell a real diamond from a fake one?

The difference between a real diamond and a false diamond is hard to tell from appearance. But experts can determine the validity of the diamond by a magnified scope. This scope can extinguish the difference between the two by the color and density.