index
—

Diamond Education

Everything You Need to Know About Lab-Grown Diamonds

Lab-grown diamonds have changed the way people shop for engagement rings and fine jewellery. They offer the beauty, brilliance and durability associated with diamonds, while being created through modern technology in a controlled environment.

Unlike natural diamonds, which form beneath the Earth over an extremely long period, lab-grown diamonds are produced above ground using specialised processes that recreate the conditions required for diamond crystal growth.

This guide explains what lab-grown diamonds are, whether they are real, how they are made, how they compare with natural diamonds and what you should consider before choosing one.

Start Learning Explore Jewellery

Understanding the Basics

What Is a Lab-Grown Diamond?

A lab-grown diamond is a diamond created in a controlled environment using advanced technology instead of being mined from beneath the Earth.

Lab-grown diamonds are made from carbon and have a diamond crystal structure. They have essentially the same hardness, brilliance and optical properties associated with natural diamonds.

The main difference between a lab-grown diamond and a natural diamond is their origin. One grows in a specialised facility, while the other forms naturally beneath the Earth's surface.

Lab-grown diamonds are also sometimes called laboratory-created diamonds, laboratory-grown diamonds, cultured diamonds or man-made diamonds.

Important distinction: A lab-grown diamond is not the same as cubic zirconia, glass or moissanite. Those materials are diamond alternatives. A lab-grown diamond has a diamond crystal structure and is classified as a diamond with a laboratory origin.

A Common Question

Are Lab-Grown Diamonds Real?

Yes. Lab-grown diamonds are real diamonds. They are not imitation diamonds and they are not visually similar materials made to resemble a diamond.

Both natural and laboratory-grown diamonds consist primarily of crystallised carbon. Both can display brilliance, fire and scintillation when they are properly cut.

Lab-grown diamonds are also extremely hard and suitable for jewellery intended for regular wear, including engagement rings, wedding rings, earrings, pendants and bracelets.

To an unaided observer, a high-quality lab-grown diamond can appear the same as a comparable natural diamond. Specialised gemological equipment and trained professionals are generally required to reliably identify the diamond's origin.

Real Diamond Crystallised carbon structure
Diamond Hardness Suitable for everyday jewellery
Same 4Cs Cut, colour, clarity and carat

Understanding the Difference

Lab-Grown Diamonds vs Natural Diamonds

Lab-grown and natural diamonds share many important characteristics, but they have different origins, production processes, market pricing and purchasing considerations.

Comparison Lab-Grown Diamond Natural Diamond
Origin Created in a controlled laboratory or manufacturing environment. Formed naturally beneath the Earth and recovered through mining.
Composition Primarily crystallised carbon with a diamond crystal structure. Primarily crystallised carbon with a diamond crystal structure.
Appearance Can display excellent brilliance, fire and sparkle. Can display excellent brilliance, fire and sparkle.
Hardness Diamond hardness and suitable for regular jewellery wear. Diamond hardness and suitable for regular jewellery wear.
Growth Time Grown using specialised technology over a much shorter period. Formed through natural geological processes over an extremely long period.
Price Generally priced below a comparable natural diamond. Generally priced higher because of natural rarity, mining and supply-chain factors.
Grading Can be evaluated using cut, colour, clarity and carat weight. Evaluated using cut, colour, clarity and carat weight.
Identification Laboratory origin should be clearly disclosed in product information and applicable grading reports. Natural origin can be confirmed through professional gemological examination.
Resale Market The secondary market is still developing and resale prices can vary significantly. Has a more established secondary market, although resale value is never guaranteed.
The better choice depends on your budget, preferences, views about origin, desired diamond size and the personal meaning of your jewellery. One option is not automatically right for every customer.

Origin and Sourcing

Where Do Lab-Grown Diamonds Come From?

Lab-grown diamonds are produced inside specialised facilities where temperature, pressure, gases and other growth conditions can be carefully controlled.

This controlled origin can provide greater visibility into where the diamond was produced. However, production standards, energy sources, working conditions and environmental practices can differ between manufacturers.

When origin and sustainability are important to you, look beyond broad marketing claims. Ask for specific information about the producer, energy usage, certification and supply-chain practices where available.

Price and Value

Why Are Lab-Grown Diamonds More Affordable?

Lab-grown diamonds are generally more affordable because their supply can be produced using repeatable technology rather than relying on the recovery of naturally rare material.

Their pricing may allow customers to consider a larger carat weight, higher colour grade, higher clarity grade or a more detailed jewellery setting while remaining within the same budget.

However, a lower purchase price should not be confused with guaranteed investment value. Diamond prices can change, and jewellery should primarily be purchased for personal use, design and emotional meaning.

Natural and lab-grown diamonds can both sell for less than their original retail price in the secondary market. Lab-grown diamond resale values may face additional pressure as production technology becomes more efficient and supply increases.

The Technical Side

How Are Lab-Grown Diamonds Made?

The two primary methods used to produce gem-quality lab-grown diamonds are High Pressure High Temperature and Chemical Vapor Deposition.

01

HPHT

High Pressure High Temperature

The HPHT process recreates the intense pressure and temperature conditions associated with natural diamond formation.

  1. A small diamond seed is placed inside a specialised growth cell.
  2. A carbon source is added around the diamond seed.
  3. The growth cell is exposed to very high pressure and temperature.
  4. The carbon material dissolves and begins crystallising around the diamond seed.
  5. After growth is complete, the rough diamond is removed, cut, polished and evaluated.
02

CVD

Chemical Vapor Deposition

The CVD process grows a diamond inside a controlled chamber using carbon-containing gas.

  1. A thin diamond seed is placed inside a vacuum chamber.
  2. Carbon-rich gas, often including methane, is introduced into the chamber.
  3. Energy is applied to break down the gas molecules.
  4. Carbon atoms gradually settle on the seed and form layers of diamond crystal.
  5. The grown diamond is removed from the chamber, cut, polished and graded.

Natural Formation

How Do Natural Diamonds Form?

Natural diamonds develop beneath the Earth's surface where carbon is exposed to suitable combinations of pressure and temperature.

Geological activity can later transport diamond-bearing material closer to the surface. Natural diamonds are then recovered from deposits, sorted, cut, polished and prepared for jewellery.

Their natural origin and geological rarity are major reasons natural diamonds have traditionally carried higher market prices.

Understanding Diamond Quality

The 4Cs of Lab-Grown Diamonds

Lab-grown diamonds are commonly assessed using the same four core quality factors used to understand natural diamonds.

01

Cut

Cut describes how effectively a diamond's proportions and facets interact with light. It has a major influence on sparkle, brightness and overall beauty.

02

Color

Colour grading for colourless diamonds generally measures the amount of visible body colour. Grades closer to colourless usually command higher prices.

03

Clarity

Clarity considers internal characteristics and surface features. Their size, position, visibility and number can affect the assigned clarity grade.

04

Carat

Carat measures diamond weight. It does not describe visual size alone, because shape, cut and proportions also affect how large a diamond appears.

Buying tip: Avoid choosing a diamond by carat weight alone. A well-cut diamond with balanced proportions can appear brighter and more attractive than a larger diamond with weaker light performance.

Diamond Documentation

Do Lab-Grown Diamonds Come With Certification?

Many lab-grown diamonds are accompanied by an independent grading report. The report provides documented information about the diamond's origin, measurements and quality characteristics.

A grading report may include:

  • Diamond shape and cutting style
  • Measurements and carat weight
  • Colour grade
  • Clarity grade
  • Cut grade where applicable
  • Polish and symmetry grades
  • Fluorescence information
  • Laboratory-grown origin disclosure
  • Report number and possible laser inscription details

Certification availability can vary according to the diamond, jewellery design, product type and seller. Always review the individual product description before ordering.

Why Customers Choose Them

Advantages of Lab-Grown Diamonds

More Flexibility Within Your Budget

The generally lower price can make it possible to explore a larger diamond, a higher quality combination or a more detailed setting.

Real Diamond Appearance

Lab-grown diamonds can offer the brilliance, sparkle and visual beauty customers expect from diamond jewellery.

Diamond Durability

They have the hardness associated with diamond and can be suitable for jewellery worn regularly when properly set and cared for.

Controlled Production

Their laboratory origin can provide greater production visibility, although standards and practices still vary between producers.

Reduced Dependence on Mining

Producing a laboratory-grown diamond avoids mining that individual stone from the Earth.

Wide Selection

Lab-grown diamonds are available in many shapes, sizes, colour grades, clarity grades and jewellery styles.

Before You Purchase

Things to Consider Before Buying a Lab-Grown Diamond

Lab-grown diamonds offer many advantages, but every customer should understand the complete picture before making a purchase.

Resale Value Can Be Uncertain

The lab-grown diamond resale market is still developing. Increasing production and improving technology may affect future prices.

Prices Can Change

As manufacturing becomes more efficient, newly produced diamonds may become less expensive. This can affect the second-hand value of previously purchased stones.

Environmental Impact Is Not Identical Everywhere

Lab-grown diamonds avoid mining that individual stone, but production still requires energy. The environmental impact can depend on the facility, technology and energy source.

Origin Should Be Clearly Disclosed

Product information and applicable grading reports should clearly identify the diamond as laboratory-grown.

Not Every Diamond Has the Same Quality

A laboratory origin does not automatically mean the diamond has excellent colour, clarity or cut. Every stone should still be evaluated individually.

Avoiding Confusion

Lab-Grown Diamond vs Moissanite and Cubic Zirconia

These materials can all be used in jewellery, but they are not the same.

Material What It Is Key Difference
Lab-Grown Diamond A laboratory-grown crystal with a diamond crystal structure. Classified and sold as a diamond with laboratory origin.
Moissanite A different gemstone material commonly used as a diamond alternative. Has different chemical and optical properties from diamond.
Cubic Zirconia A manufactured diamond simulant. Softer and chemically different from diamond.

Buying Guidance

How to Choose the Right Lab-Grown Diamond

Step 1

Decide Your Total Budget

Include the centre diamond, metal, setting, customisation, taxes and other applicable charges.

Step 2

Choose a Diamond Shape

Consider round, oval, emerald, pear, cushion, radiant, princess and other shapes according to your personal style.

Step 3

Prioritise Cut Quality

Good proportions and cutting can improve brightness and sparkle.

Step 4

Balance Colour and Clarity

Choose grades that appear attractive to your eye instead of paying only for differences that may not be visibly noticeable.

Step 5

Review the Grading Report

Confirm the stated origin, measurements, grades and report number where certification is provided.

Step 6

Select a Suitable Setting

Consider comfort, prong security, ring profile, metal choice and your everyday lifestyle.

Jewellery Care

Do Lab-Grown Diamonds Become Cloudy?

A genuine lab-grown diamond does not become a different material or permanently turn cloudy simply because it was created in a laboratory.

Like natural diamond jewellery, its surface can collect oil, soap, lotion, dust and other residue. This buildup can reduce visible sparkle until the jewellery is cleaned.

To keep your jewellery looking its best:

  • Clean it gently with warm water and mild soap.
  • Use a soft brush around the stone and setting.
  • Avoid harsh household chemicals.
  • Remove jewellery before heavy physical work or exercise.
  • Store separate pieces carefully to reduce scratching.
  • Have prongs, clasps and settings inspected periodically.

Frequently Asked Questions

Lab-Grown Diamond FAQs

Are lab-grown diamonds real diamonds? +
Yes. Lab-grown diamonds are diamonds created in a controlled environment. They have a diamond crystal structure and share essentially the same fundamental physical and optical properties as natural diamonds.
Can people tell that a diamond is lab-grown by looking at it? +
Reliable identification generally requires trained professionals and specialised gemological equipment. Product information and the grading report should clearly disclose laboratory-grown origin.
Are lab-grown diamonds as hard as natural diamonds? +
Both are diamonds and have the hardness associated with diamond. However, jewellery settings and exposed diamond edges can still be damaged by strong impact.
Do lab-grown diamonds have inclusions? +
Yes. Lab-grown diamonds can contain internal and external characteristics. These features are considered when assigning a clarity grade.
Do lab-grown diamonds hold their value? +
Resale value is not guaranteed. The lab-grown diamond secondary market is still developing, and increasing supply can affect future prices.
Are lab-grown diamonds more sustainable? +
They avoid mining that individual diamond, but manufacturing still uses energy. Environmental impact varies according to the producer, growth method and energy source.
Do lab-grown diamonds become cloudy over time? +
They do not naturally become cloudy because of their laboratory origin. Dirt, oil and residue can reduce sparkle, but proper cleaning can restore the appearance.
What are the disadvantages of lab-grown diamonds? +
The main considerations include uncertain resale value, changing market prices and differences in environmental impact between producers.
Are lab-grown diamonds suitable for engagement rings? +
Yes. Their hardness, brilliance and availability in many shapes and sizes make them suitable for engagement rings and other fine jewellery.
Should I choose a certified lab-grown diamond? +
An independent grading report can provide useful documentation about origin, measurements and quality. Certification availability can vary by product.

Discover Lab-Grown Diamond Jewellery

Explore jewellery designed with modern diamonds, timeless style and thoughtful craftsmanship.

Explore Jewellery Contact Our Team
ONLY CARAT
Subscribe

Get on the Guest List

About Us

About Us

About Us

About Us

About Us

Payment methods
© 2026 ONLYCARAT.COM
OrdersProfile