• February 3, 2023
Testing Lab Grown Diamonds


What are Lab Grown Diamonds?

Lab Grown Diamonds have essentially the same chemical, optical and physical properties and crystal structure as natural diamonds. Like natural diamonds, they are made of tightly-bonded carbon atoms. They respond to light in the same way and are just as hard as natural diamonds. The main differences between Lab Grown and natural diamonds lie in their origin. Think of it this way: Lab Grown Diamonds are like ice from your refrigerator, while natural diamonds are like ice from a glacier. They are both ice, although their formation stories and age are very different.

How are Lab Grown Diamonds made?

How to Tell If a Diamond Is Natural or Lab Grown : Identifying Man-made or Synthetic Diamonds : Arden JewelersThere are two main processes used to create Lab Grown Diamonds:

1. High Pressure, High Temperature (HPHT)

With this method, Lab Grown Diamonds are produced using high-pressure, high-temperature conditions similar to what natural diamonds experience on the earth. HPHT diamond growth occurs at pressures of 5–6 GPa and at temperatures of 1300–1600°C.

Lower-quality diamonds, whether natural or lab-grown, can also be put through the HPHT process to improve color. In addition to making diamonds more colorless, this process can also be used to change the color of diamonds to pink, blue or yellow. The diamond would then be called a “treated” diamond. This is disclosed in GIA reports.

Chemical Vapor Deposition for Lab-Grown Diamonds | Alicat2. Chemical Vapor Deposition (CVD)

This technique enables scientists to grow Lab Grown Diamonds using moderate temperatures (700°C to 1300°C) and lower pressures. Carbon-containing gas is pumped into a vacuum chamber and deposited onto a diamond seed, crystallizing as a Lab Grown Diamond. The eventual size of the diamond depends on the time allowed for growth.

How does GIA evaluate Lab Grown Diamonds?

When a Lab Grown diamond is submitted to a GIA laboratory, it is first examined to determine if it is natural or laboratory-grown. Then, GIA graders evaluate it using the 4Cs, a standard of evaluation created by GIA and implemented all over the world. Our graders evaluate each laboratory-grown diamond with the same meticulous care as natural diamonds.

Using spectroscopy and other advanced testing methods, GIA scientists can determine how a diamond was grown—through the high-pressure, high-temperature (HPHT) method or the chemical vapor deposition (CVD) method. As an added precaution to protect consumers, GIA also laser-inscribes the diamond’s girdle with the report number and a statement that identifies the diamond as lab-grown.

Laboratory-grown diamonds are becoming increasingly popular for their fiery sparkle, exceptional quality, and ability to maximize your budget. But do these stunning gems pass the same tests used to measure the quality of natural diamonds? Here’s how laboratory-grown diamonds stack up to their natural counterparts.

Can a jeweler tell that a diamond is lab-grown?

Developed in dedicated facilities, laboratory-grown diamonds possess the same chemical properties (i.e. pure crystallized carbon) and visual characteristics as natural diamonds that are mined from the earth. Depending on the size of the stone, lab-grown diamonds can take up to a month or more to create. Jewelers can tell that a diamond is lab-grown thanks to microscopic inscriptions that identify them as such. Without highly specialized equipment, however, it isn’t possible to know whether a diamond was naturally mined or grown in a lab.


GIA iD100® GEM Testing Device

GIA iD100® – GIA StoreThe GIA iD100® gem testing device combines advanced spectroscopic technology and more than 60 years of GIA diamond and gemstone identification research to deliver a sophisticated and easy-to-operate desktop instrument to screen your stones. Small, yet powerful, the GIA iD100 gives you a simple and clear determination in under two seconds and an unrivaled accuracy that lets you get on with business confidently.

Natural Vs Lab Grown Vs Simulants

The GIA iD100 distinguishes simulated and laboratory-grown diamonds from natural diamonds. It can test colorless to near-colorless, blue-to-green, and brown diamonds.

Not all UV diamond testers are created equal. Rather than using UV light, which can lead to false readings, the GIA iD100 uses fluorescence spectroscopy – one of the most accurate and advanced technologies available to determine if a stone is natural.

Test mounted jewelry with pinpoint accuracy

The GIA iD100 was designed with a probe that is easily manipulated to reach every diamond in mounted jewelry. Due to the small, pinpoint the size of the probe, you can test diamonds as small as 0.9mm in diameter.

No graphs, colors, reference charts, or data to interpret to determine if your stone is a natural diamond or not. In just two seconds you get a simple “Pass” for natural diamonds and “Refer” for stones that need more testing.

Pink Diamond Software Upgrade

Diamonds.net - Advertorial - GIA ... Full Disclosure at Your FingertipsThe GIA iD100® Pink Diamond Software Upgrade is an add-on to the device available that utilizes the advanced spectroscopic technology, combined with GIA’s pink diamond identification research, to distinguish natural pink diamonds from lab-grown diamonds, diamond simulants, and natural diamonds whose pink color is introduced by treatments involving irradiation and annealing.

The GIA iD100® employs highly-sensitive spectroscopy technologies to detect trace amounts of diamond lattice defects. The portable device is non-destructive to stones and was created to be quick, highly reliable, and with broad applications to address the needs of the trade.

Do Lab Grown Diamonds pass a diamond tester?

How It Works: GIA® iD100™ Gem Tester - YouTubeBecause diamonds are fine conductors of heat, they are tested for authenticity using heat resistance testers. Thermal Conductivity and Electrical Conductivity are the two types of testers used.

Helzberg Diamonds uses Electrical Conductivity to test diamonds for nitrogen, which forms naturally while the stone grows in the earth. However, since specific lab-grown diamonds are created from high-quality diamond seeds, they may contain less nitrogen as well as trace amounts of boron.

This can sometimes cause a false negative. This doesn’t mean the diamond isn’t natural; laboratory-grown diamonds are still physically, chemically, and optically identical to natural diamonds.

Diamond testers can be misleading. This is why our lab-grown diamond center stones are graded by an independent, 3rd party lab (GCAL) to confirm they are, in fact, real diamonds.

Mintly, the hiring marketplace for the gems, jewelry, and metals industry, aids in providing employment opportunities for lab grown diamond-related roles and jobs.

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