Do Lab Grown Diamonds Pass the Diamond Tester?

Yes, lab grown diamonds can pass a standard diamond tester and register as a real diamond.

This happens because a lab grown diamond is a real diamond. It is not the same as a diamond simulant such as cubic zirconia or some other imitation stone.

Lab grown diamonds have essentially the same chemical and physical properties as natural diamonds. Because of this, a basic diamond tester may identify both stones as diamonds. The first page results also confirm that standard diamond testers generally cannot determine whether a diamond came from a laboratory or from the earth.

However, there is an important difference between testing whether a stone is a diamond and identifying where the diamond came from.

A basic tester may answer the first question.

It usually cannot answer the second one.

Why Do Lab Grown Diamonds Pass a Diamond Tester?

The main reason is simple.

A lab grown diamond has the same basic diamond structure and chemical composition as a natural diamond.

Both are made of carbon arranged in the diamond crystal structure.

Standard diamond testers are designed to detect properties associated with diamond. They are not necessarily designed to determine whether that diamond was created naturally or grown in a laboratory.

GIA explains that laboratory grown diamonds are chemically and optically very similar to natural diamonds, which is why older style diamond detectors cannot reliably separate the two.

This is why someone can place a lab grown diamond under a basic tester and receive a result indicating diamond.

How Does a Standard Diamond Tester Work?

Many handheld diamond testers use thermal conductivity as part of their testing process.

The tester sends a small amount of energy through the testing probe and measures how the stone responds.

Diamond has very high thermal conductivity.

Lab grown diamonds also have this important property.

As a result, a standard thermal diamond tester can respond to both a natural diamond and a lab grown diamond.

The first page data specifically explains that standard thermal testers measure how quickly a stone conducts heat and that lab grown diamonds can produce the same diamond result because they conduct heat in a similar way.

Can a Diamond Tester Tell If a Diamond Is Lab Grown?

A basic diamond tester usually cannot tell the difference.

This is one of the most important points to understand.

A result that says a stone is a diamond does not automatically mean that the stone is a natural diamond.

It may be a lab grown diamond.

GIA states that traditional gemological observations and older diamond detectors are not sufficient to separate laboratory grown diamonds from natural diamonds. More advanced instruments and professional laboratory testing are used for reliable identification.

So, if a tester lights up or produces a diamond result, that does not prove the stone was mined from the earth.

Are Lab Grown Diamonds Real Diamonds?

Yes.

Lab grown diamonds are real diamonds.

The term lab grown describes their origin rather than saying that they are imitation stones.

Natural diamonds form inside the earth under natural geological conditions.

Lab grown diamonds are created using controlled laboratory processes.

The two main laboratory growth methods are HPHT, which means high pressure high temperature, and CVD, which means chemical vapor deposition. GIA identifies both methods as established ways of producing laboratory grown diamonds.

This is why a lab grown diamond can pass a basic diamond test even though its origin is different.

Lab Grown Diamond vs Natural Diamond on a Tester

A simple comparison makes the difference easier to understand.

Test or Feature	Lab Grown Diamond	Natural Diamond
Is it a diamond?	Yes	Yes
Carbon crystal structure	Diamond	Diamond
Basic thermal tester	Can test as diamond	Can test as diamond
Basic tester identifies origin	No	No
Advanced gemological testing	Can identify laboratory origin	Can identify natural origin
Professional laboratory report	Can confirm lab grown origin	Can confirm natural origin

The important point is that a basic diamond tester checks the stone, while advanced gemological equipment can investigate its origin.

Can a Lab Diamond Fail a Diamond Tester?

A lab grown diamond should not be treated as fake simply because a particular tester gives an unexpected result.

Testing devices have different technologies, conditions, and limitations.

A result can also depend on the type of stone, the testing method, the condition of the instrument, and how the test is performed.

GIA notes that modern diamond screening instruments have specific scopes and limitations. Some screening devices provide a pass or refer result rather than directly giving a final natural or laboratory origin determination.

If a valuable diamond gives an unusual result, it is better to have it examined professionally rather than relying on one inexpensive handheld device.

Can a Diamond Tester Detect Moissanite?

Some diamond testers are designed to help distinguish diamond from moissanite.

This is different from identifying lab grown diamonds.

Moissanite is a diamond simulant, while a lab grown diamond is diamond.

Some modern testers use more than one measurement to help separate diamond from moissanite. However, a device designed to separate diamond from a simulant should not automatically be treated as a reliable method for determining whether the diamond is natural or laboratory grown.

That distinction is important when buying or checking jewelry.

How Do Experts Tell Lab Grown Diamonds Apart?

Professional identification uses more advanced methods.

Gemological laboratories can examine characteristics that reveal how a diamond formed.

These may include growth patterns, fluorescence behavior, inclusions, spectroscopy, and other features within the diamond.

GIA explains that laboratory grown diamonds can have distinctive characteristics related to their growth process. Advanced spectroscopic and gemological techniques can be used to determine whether a diamond is natural or laboratory grown.

For example, GIA developed the GIA iD100 screening instrument to help distinguish natural diamonds from laboratory grown diamonds and certain simulants.

Can a Jeweler Tell If a Diamond Is Lab Grown?

An experienced jeweler may be able to recognize signs that suggest a diamond needs further examination.

However, visual inspection alone should not always be treated as final proof.

GIA explains that laboratory grown diamonds can be difficult to distinguish from natural diamonds because they share many physical and optical properties. Professional identification may require specialized equipment.

If the diamond has significant value, a gemological report provides much stronger evidence than a basic handheld tester.

How Can You Know If a Diamond Is Lab Grown?

One of the most reliable options is a report from a recognized gemological laboratory.

A professional report can identify whether the stone is natural or laboratory grown.

GIA currently offers laboratory grown diamond services and reports. GIA also states that laboratory grown diamonds submitted for its services can receive a laser inscription identifying them as laboratory grown along with the relevant report number.

You can learn more about professional diamond identification through GIA laboratory grown diamond services.

What Does a Diamond Tester Actually Tell You?

A basic tester should not be treated as a complete diamond authentication system.

It may help answer a simple question such as whether the material behaves like diamond under the tester’s measurement.

But it does not necessarily answer questions about:

Where was the diamond created?

Is the diamond natural or lab grown?

Was the diamond treated?

What is the diamond’s quality?

Does the diamond have a grading report?

These questions require additional information and, in some cases, professional examination.

Why Do People Test Lab Grown Diamonds?

People may use a diamond tester for several reasons.

A buyer may want to check a loose stone.

Someone receiving a piece of jewelry may want an initial test.

A jeweler may use a screening device as part of a larger identification process.

However, the result should be interpreted according to the type and limitations of the tester.

For an expensive purchase, a professional report is much more useful than relying only on a small handheld tester.

Do Lab Grown Diamonds Pass Advanced Diamond Testing?

This depends on what type of testing equipment is being used.

A simple thermal tester may identify a lab grown diamond as diamond.

More advanced screening equipment can be specifically designed to separate natural diamonds from laboratory grown diamonds.

GIA explains that modern screening instruments can identify natural signatures and refer to stones that may be laboratory grown or otherwise require additional examination.

This means the phrase diamond tester can be misleading because not every tester performs the same type of analysis.

What If a Lab Diamond Tests as Diamond?

That is generally expected with a basic diamond tester.

It does not mean the tester is broken.

It does not mean the lab diamond is fake.

It simply means that the stone has properties that the tester recognizes as diamond.

To determine its origin, a different type of examination may be required.

What If a Lab Diamond Does Not Test as Diamond?

Do not immediately assume that the stone is fake.

Check the tester’s instructions and testing method first.

The stone may also need to be cleaned before testing.

The testing surface and probe position can matter as well.

If the result remains unusual, professional testing is the safest option for an expensive stone.

Frequently Asked Questions

Do lab grown diamonds pass the diamond tester?

Yes. Standard diamond testers can identify lab grown diamonds as diamond because lab grown diamonds have the essential chemical and physical characteristics of diamond. A basic tester generally cannot determine whether the diamond is lab grown or natural.

Why do jewelers not like lab diamonds?

This can depend on the jeweler and the business model. Lab grown diamonds are real diamonds, but they have a different origin and can have different market pricing and consumer expectations. A jeweler may also need specialized equipment to identify their origin.

Can a jeweller tell if a diamond is lab grown?

A jeweler may identify clues that suggest a stone needs further testing, but reliable identification can require specialized gemological equipment. GIA states that advanced testing is used to distinguish laboratory grown diamonds from natural diamonds.

What is the downside of lab grown diamonds?

The answer depends on what the buyer values. Lab grown diamonds are real diamonds, but they are created in a laboratory rather than formed naturally in the earth. Buyers should also understand the differences in origin, certification, market pricing, and long term resale expectations before purchasing.

Do rich people buy lab diamonds?

People with different income levels purchase both natural and lab grown diamonds. A person’s income alone does not determine which type of diamond they choose.

Can lab grown diamonds fool a diamond tester?

A basic diamond tester may identify a lab grown diamond as diamond because it is a real diamond. However, specialized screening equipment can be designed to distinguish laboratory grown diamonds from natural diamonds.

Do lab grown diamonds test as real diamonds?

Yes. Lab grown diamonds can test as real diamonds on standard diamond testers. This happens because they have the fundamental properties of diamond.

How can you tell if a diamond is lab grown?

A professional gemological examination can determine whether a diamond is laboratory grown. Advanced equipment can examine characteristics associated with HPHT or CVD growth and distinguish them from natural diamond characteristics.

Final Answer

So, do lab grown diamonds pass the diamond tester?

Yes, a standard diamond tester can register a lab grown diamond as a real diamond.

The reason is simple. A lab grown diamond is a real diamond, not a diamond simulant.

The key limitation is that a basic tester usually cannot tell you whether the diamond was grown in a laboratory or formed naturally.

If you need to confirm the diamond’s origin, use a professional gemological examination or an appropriate advanced screening system rather than relying on a basic handheld tester. Also read this How to Become a Product Tester: Free Products and Paid Tests.