If you have been looking at lab-grown diamonds lately, you have probably noticed two things: prices can vary wildly, and every seller seems to describe their diamonds as exceptional.
The truth is a little less dramatic. Lab-grown diamonds can offer excellent value, but they still need to be chosen carefully. A large diamond is not automatically a beautiful diamond, and a grading report does not tell you everything about how the stone will look in person.
Here is what Canadian buyers should actually pay attention to in 2026.
First: Are lab-grown diamonds real diamonds?
Yes. A lab-grown diamond is not cubic zirconia, glass or moissanite. It has the same fundamental chemical, crystal and optical properties as a mined diamond.
The main difference is origin. A mined diamond formed naturally underground, while a lab-grown diamond was produced under controlled conditions using specialized equipment.
Both can scratch glass, last for generations and display the brilliance and fire people associate with diamonds. Proper testing equipment is generally required to reliably distinguish between them.
Why are lab-grown diamonds less expensive?
Lab-grown diamonds do not have the same supply constraints as mined diamonds. Production has become more efficient, and competition between growers has increased.
That usually means you can choose a larger diamond or stronger specifications without spending as much as you would on a comparable mined stone.
The trade-off is that lab-grown diamond prices have continued to change as production improves. They should be purchased primarily for their beauty and enjoyment—not because you expect them to increase in value.
That is also a sensible way to approach most new jewelry. Buy the piece because you want to wear it, not because someone has presented it as an investment.
Do not choose by carat weight alone
Carat is a measure of weight, not visible size.
Two diamonds can weigh exactly two carats and still look noticeably different from the top. One may carry more of its weight underneath the stone, while another has dimensions that create a larger face-up appearance.
When comparing diamonds, look at:
- Length and width measurements
- Overall proportions
- Shape and outline
- Cut quality
- Videos taken in realistic lighting
- Whether the stone has large dark or transparent-looking areas
A well-chosen 1.80-carat diamond can sometimes look better—and occasionally almost as large—as a poorly proportioned two-carat diamond.
Put cut quality ahead of extreme colour and clarity grades
The Four Cs are cut, colour, clarity and carat weight. All four matter, but they do not have an equal effect on what you see.
Cut
Cut controls how effectively a diamond handles light. It has a major influence on brightness, fire and sparkle.
For a round brilliant diamond, an excellent cut grade is a useful starting point. Even then, compare proportions and videos because two diamonds with the same overall grade can still look different.
Fancy shapes such as oval, pear, radiant and marquise diamonds require more visual judgment. Pay attention to symmetry, outline and bow-tie contrast—the darker area that can appear across the centre of some elongated diamonds.
A bow tie is not automatically bad. The question is whether it adds attractive contrast or dominates the stone.
Colour
Colour grades run from D, which is colourless, through increasingly noticeable levels of yellow or brown.
Many buyers pay for a D colour because it sounds like the best choice. In practice, a well-selected diamond several grades lower can still look very white once mounted.
The metal also matters. A slightly warmer diamond may be less noticeable in yellow or rose gold than it would be in a white-metal setting.
Clarity
Clarity describes internal and external characteristics viewed under magnification.
The practical goal for most buyers is an eye-clean diamond: one without distracting inclusions visible during normal wear. Paying for extremely high clarity can add cost without creating a noticeable difference.
The location of an inclusion often matters more than the grade alone. A small inclusion near the edge may be less concerning than one directly under the centre of the table.
Carat
Once cut, colour and clarity are in a sensible range, carat weight becomes a matter of preference and budget.
Do not become overly attached to round numbers. Diamonds just under popular milestones—such as 1.90 instead of 2.00 carats—can sometimes offer better value without looking meaningfully smaller.
Which diamond shapes are popular in Canada?
Round diamonds remain the classic choice and are generally the easiest shape for comparing cut quality.
Oval diamonds continue to be popular because their elongated shape can look graceful and create a large face-up appearance. Radiant cuts offer a more angular outline with lively sparkle, while emerald cuts have broader flashes and a cleaner, hall-of-mirrors look.
Pear, marquise and elongated cushion diamonds are also attracting buyers who want something less traditional.
There is no objectively best shape. A person who loves the crisp geometry of an emerald cut may not be impressed by the busier sparkle of a radiant, and the reverse is equally true.
What should the grading report include?
For a significant centre diamond, look for an independent grading report that clearly identifies the stone as laboratory-grown.
The report should include information such as:
- Diamond shape and measurements
- Carat weight
- Colour and clarity assessment
- Cut information where applicable
- Polish and symmetry
- Fluorescence, when reported
- Comments about laboratory-grown origin
- The grading-report number
IGI remains common in the lab-grown market and provides reports containing the diamond's origin and Four Cs. Report numbers can be checked using IGI's online verification service.
GIA changed its laboratory-grown diamond reporting system in late 2025. Newer GIA reports use broader Premium and Standard quality categories, while older reports may use familiar colour and clarity grades. That means two reports from different laboratories—or different years—may not present information in exactly the same format. GIA explains its updated system here.
A grading report is valuable, but it is not a beauty certificate. It cannot fully describe whether you will like a diamond's facet pattern, outline or movement.
Can you verify the inscription?
Many graded diamonds have their report number laser-inscribed on the girdle, which is the narrow edge around the stone.
The inscription is microscopic and normally requires magnification to read. It can help connect the physical diamond to its grading report.
When receiving an important piece, you can ask whether the inscription has been checked against the report number.
Be careful with environmental claims
Lab-grown diamonds avoid diamond mining, but that does not mean every laboratory-grown diamond automatically has a low environmental impact.
Producing diamonds requires energy, and the source of that energy can differ between facilities and countries. Broad claims such as “completely sustainable” or “carbon-free” deserve evidence.
A more accurate description is that lab-grown diamonds have a different production process and supply chain from mined diamonds. Buyers can then decide which considerations matter most to them.
What should Canadian buyers check before ordering?
Buying from a Canadian jewelry business can make pricing, shipping and customer service more straightforward, but you should still read the details.
Before placing an order, confirm:
- Whether prices are displayed in Canadian or US dollars
- Which taxes will be charged for your province
- Whether the jewelry ships from within Canada
- Whether duties or brokerage fees could apply
- Whether the item is made to order
- The estimated production and delivery time
- Whether resizing is available
- The return policy for customized items
- Who pays for insured return shipping
- What warranty or repair service is included
If you order from outside Canada, GST/HST and other import-related charges may apply depending on the transaction and where the order originates. The Canada Revenue Agency provides general information about GST/HST on imports.
For engagement rings, leave more time than you think you need. Production, quality checks, shipping and resizing can all add time.
How much should you spend?
There is no correct amount.
Start with a budget that does not interfere with your other financial priorities. Then decide which visible features matter most.
One buyer might choose a larger diamond with practical colour and clarity grades. Another may prefer a smaller centre stone in a more detailed setting. Neither approach is wrong.
A good jeweller should help you understand the trade-offs instead of simply pushing every specification higher.
A sensible lab-grown diamond checklist
Before buying, ask yourself:
- Do I like the diamond in video, not just on paper?
- Are the measurements appropriate for its carat weight?
- Is the diamond eye-clean?
- Does the colour suit the setting?
- Is the grading report independently verifiable?
- Have I checked the return, resizing and warranty policies?
- Do I understand the final cost in Canadian dollars?
- Would I still choose this diamond if I could not see the carat number?
That final question is surprisingly useful. The best diamond is not necessarily the one with the most impressive specifications. It is the one that looks beautiful, fits the setting and makes sense for your budget.
The bottom line
Lab-grown diamonds have made larger and higher-quality-looking jewelry accessible to more buyers. That is their main appeal.
The smartest purchase is rarely the biggest diamond you can afford. It is a well-cut, attractive stone with sensible specifications, a verifiable report and a setting suited to the person who will wear it.
Take time to compare. Ask questions. Look beyond the headline carat weight.
You can browse Promise Jewelry's lab-grown diamond fine jewelry or read our lab diamond FAQs before choosing your piece.
