IGI Certified Lab Grown Diamonds
IGI certified lab grown diamonds are laboratory-grown diamonds that have been graded by the International Gemological Institute. An IGI report gives buyers important information about the diamond, including carat weight, colour grade, clarity grade, measurements, polish, symmetry, fluorescence, lab grown origin, and other grading details depending on the report type.
For buyers, certification is one of the most important parts of choosing a lab grown diamond. A certificate helps you compare diamonds properly instead of relying only on photos, price, or seller descriptions. This is especially important when buying loose lab grown diamonds online, selecting an engagement ring centre stone, sourcing matched pairs, or buying wholesale lab grown diamonds for jewellery production.
At Uniglo Diamonds, buyers can explore certified lab grown diamonds and request current availability based on shape, carat, colour, clarity, certificate, price range, and wholesale requirements. This guide explains what IGI certification means, why it matters, how to read an IGI lab grown diamond report, and what to check before buying.
Quick Answer: What Is an IGI Certified Lab Grown Diamond?
An IGI certified lab grown diamond is a real lab grown diamond that has been graded by the International Gemological Institute. The IGI report records the diamond’s specifications and confirms that the stone is laboratory-grown rather than naturally mined.
The certificate helps buyers understand exactly what they are comparing. Two lab grown diamonds may look similar online, but their certificates can show major differences in carat weight, colour, clarity, measurements, polish, symmetry, and overall quality. For important purchases, an IGI certificate gives more confidence and makes the buying process more transparent.
IGI Certified Lab Grown Diamonds at a Glance
| Feature | What It Means |
|---|---|
| IGI | International Gemological Institute |
| Diamond type | Lab grown diamond |
| Certificate purpose | Confirms grading details and lab grown origin |
| Common report details | Carat, colour, clarity, measurements, polish, symmetry, fluorescence |
| Best for | Loose diamonds, engagement rings, earrings, wholesale buying, jewellery production |
| Buyer benefit | Easier comparison and more confidence |
| Important check | Report number and certificate details |
| Should buyers verify it? | Yes, whenever possible |
Why IGI Certification Matters for Lab Grown Diamonds
IGI certification matters because lab grown diamond buyers need clear, third-party grading information. Without a grading report, it is much harder to compare one diamond with another. A seller may describe a stone as beautiful, high quality, or excellent value, but the certificate gives structured information that helps buyers make a more informed decision.
For online buying, certification becomes even more important because the buyer may not see the diamond in person before purchase. The IGI report helps confirm what the diamond is and what quality grades it carries. It also helps jewellers and wholesale buyers compare multiple stones quickly and accurately.
| Why IGI Certification Helps | Buyer Benefit |
|---|---|
| Confirms lab grown origin | Reduces confusion between lab grown and natural diamonds |
| Lists diamond specifications | Helps compare cut, colour, clarity, and carat |
| Provides measurements | Helps understand actual size and proportions |
| Supports online buying | Gives more confidence before purchase |
| Helps wholesale comparison | Useful for jewellers, retailers, and manufacturers |
| Supports transparency | Makes the buying process clearer |
Are IGI Certified Lab Grown Diamonds Real Diamonds?
Yes, IGI certified lab grown diamonds are real diamonds. They are not fake diamonds, cubic zirconia, moissanite, glass, or crystal. A lab grown diamond is made of carbon and has diamond properties. The IGI certificate confirms that the stone is laboratory-grown and gives its grading details.
The word “lab grown” explains origin. It does not mean the diamond is fake. A natural diamond forms underground, while a lab grown diamond is created in controlled laboratory conditions. Both can be real diamonds, but they have different origins and different market values.
| Question | Direct Answer |
|---|---|
| Are IGI certified lab grown diamonds real? | Yes, they are real diamonds. |
| Are IGI lab diamonds fake? | No, they are not fake diamonds. |
| Are IGI lab diamonds moissanite? | No, moissanite is a different gemstone. |
| Are IGI lab diamonds cubic zirconia? | No, cubic zirconia is a simulant. |
| Does IGI certify lab grown diamonds? | Yes, IGI grades lab grown diamonds. |
| Should the origin be disclosed? | Yes, the report should state lab grown origin. |
What Does an IGI Lab Grown Diamond Report Include?
An IGI lab grown diamond report can include several important details about the diamond. These details help buyers understand the stone’s quality and compare it with other diamonds.
The exact report format can vary, but buyers should look for the main diamond specifications. These include carat weight, colour grade, clarity grade, measurements, polish, symmetry, fluorescence, proportions, shape, and lab grown origin. Some reports may also include information related to growth method or post-growth treatment where applicable.
| IGI Report Detail | Why It Matters |
|---|---|
| Report number | Helps identify and verify the certificate |
| Shape and cutting style | Shows the diamond’s shape and facet style |
| Measurements | Shows actual size in millimetres |
| Carat weight | Shows diamond weight |
| Colour grade | Helps compare how colourless the diamond appears |
| Clarity grade | Shows internal and external characteristics |
| Polish | Shows surface finish quality |
| Symmetry | Shows precision of shape and facet alignment |
| Fluorescence | Describes reaction to ultraviolet light |
| Lab grown origin | Confirms the diamond is laboratory-grown |
| Comments | May include additional important notes |
How to Read an IGI Certified Lab Grown Diamond Report
Reading an IGI report is easier when you understand what each section means. The buyer should not only look at carat weight. A diamond’s beauty and value depend on the full combination of specifications.
For example, a 2 carat lab grown diamond with excellent proportions and eye-clean clarity may be a better choice than a larger diamond with poor cut or unclear appearance. The certificate gives structure, but the buyer should still consider the diamond’s visual beauty and intended use.
| Report Section | Buyer Question to Ask |
|---|---|
| Shape | Is this the shape I want for my jewellery design? |
| Carat | Does the size match my budget and style? |
| Measurements | Does the diamond face up well for its carat weight? |
| Colour | Will the diamond look white enough in my chosen setting? |
| Clarity | Is the diamond eye-clean for my purpose? |
| Polish | Is the finish quality strong? |
| Symmetry | Is the diamond cut with good alignment? |
| Fluorescence | Could it affect appearance in some lighting? |
| Origin | Is the diamond clearly stated as lab grown? |
IGI Certification and the 4Cs
The 4Cs are cut, colour, clarity, and carat. They are the main language buyers use to compare diamonds. IGI certification helps organise these details in a clear report.
For lab grown diamonds, the 4Cs still matter just as they do with natural diamonds. A lab grown diamond is not automatically high quality just because it is certified. Certification tells you what the diamond is, but you still need to decide whether the grade combination is right for your budget and purpose.
| 4C | What It Means | Why It Matters |
|---|---|---|
| Cut | How well the diamond is cut and proportioned | Strongly affects sparkle |
| Colour | How colourless or tinted the diamond appears | Affects appearance and price |
| Clarity | Internal and surface characteristics | Affects visual cleanliness |
| Carat | Diamond weight | Affects size and price |
IGI Certified Lab Grown Diamond Colour Grades
Colour grade helps buyers understand how white or tinted a diamond appears. Many buyers prefer colourless or near-colourless lab grown diamonds, especially for engagement rings. However, the best colour grade depends on the setting, shape, budget, and personal preference.
A buyer does not always need the highest colour grade to get a beautiful diamond. In some settings, a near-colourless diamond can look excellent and offer better value than the highest colour grade.
| Colour Preference | Buyer Note |
|---|---|
| Colourless | Premium appearance, usually higher price |
| Near-colourless | Strong value for many buyers |
| Slight warmth | May work well in yellow or rose gold settings |
| Fancy colour | Chosen for unique jewellery styles |
IGI Certified Lab Grown Diamond Clarity Grades
Clarity grade describes internal inclusions and surface features. A higher clarity grade usually means fewer visible characteristics, but many buyers do not need the highest clarity grade if the diamond is eye-clean.
Eye-clean means the diamond’s inclusions are not easily visible to the naked eye under normal viewing. For engagement rings and jewellery, eye-clean clarity can offer excellent value.
| Clarity Buying Approach | Best For |
|---|---|
| Highest clarity | Buyers who want premium specifications |
| Eye-clean clarity | Most engagement ring and jewellery buyers |
| Balanced clarity | Buyers who want better value |
| Wholesale clarity ranges | Jewellers and manufacturers sourcing by grade mix |
IGI Certified Lab Grown Diamond Cut Quality
Cut quality is extremely important because it affects sparkle. A diamond can have strong colour and clarity, but if the cut is weak, it may not look bright. Buyers should pay close attention to proportions, polish, symmetry, and overall visual performance.
For round diamonds, cut grading is especially important. For fancy shapes such as oval, emerald, cushion, pear, radiant, and marquise, buyers should also look at measurements, proportions, bow-tie effect where relevant, and visual appearance.
| Shape | Cut Quality Check |
|---|---|
| Round | Cut grade, proportions, brilliance |
| Oval | Bow-tie, length-to-width ratio, spread |
| Emerald | Symmetry, clarity, step-cut appearance |
| Cushion | Brilliance, shape outline, depth |
| Radiant | Sparkle, table, depth, shape balance |
| Pear | Bow-tie, symmetry, tip protection |
| Marquise | Bow-tie, length, symmetry |
| Princess | Sharp corners, brilliance, depth |
IGI Certified Lab Grown Diamond Carat Weight
Carat weight is one of the biggest price factors. However, carat weight should not be judged alone. A diamond’s measurements can change how large it appears when viewed from the top.
For example, two 2 carat lab grown diamonds may not look the same size if one is deeper and the other has better face-up spread. This is why buyers should check both carat weight and measurements.
| Carat Search | Buyer Intent |
|---|---|
| 1 carat IGI certified lab grown diamond | Classic engagement ring or solitaire search |
| 2 carat IGI certified lab grown diamond | Larger centre stone search |
| 3 carat IGI certified lab grown diamond | Premium statement stone |
| IGI certified lab diamond pair | Earrings or matched jewellery |
| IGI certified loose lab diamond | Custom jewellery or sourcing |
How to Verify an IGI Lab Grown Diamond Certificate
Buyers should verify an IGI certificate whenever possible. The report number on the certificate should match the diamond being offered. The details on the report should match the seller’s listing, including carat weight, shape, colour, clarity, and measurements.
Verification helps reduce confusion and improves buyer confidence. It is especially important when buying online, buying a loose diamond, or buying a higher-value stone.
| Verification Step | What to Do |
|---|---|
| Ask for the report number | Every certified stone should have report details |
| Match the shape | Confirm the shape matches the certificate |
| Match the carat weight | Check the listed weight |
| Match colour and clarity | Make sure grades are consistent |
| Match measurements | Confirm millimetre measurements |
| Check origin | Report should state lab grown origin |
| Ask questions | A transparent supplier should answer clearly |
IGI Certified Lab Grown Diamonds vs Non-Certified Lab Diamonds
Certified diamonds are easier to compare than non-certified diamonds. A non-certified lab grown diamond may still be real, but buyers have less independent information. This can make price comparison difficult.
For important purchases such as engagement rings, larger loose diamonds, matched pairs, and wholesale buying, certification is strongly recommended. It gives buyers more structure and confidence.
| Feature | IGI Certified Lab Grown Diamond | Non-Certified Lab Diamond |
|---|---|---|
| Grading report | Yes | No |
| Easier to compare | Yes | Harder |
| Origin clearly stated | Yes | Depends on seller |
| Better for online buying | Yes | Riskier |
| Better for large purchases | Yes | Less ideal |
| Better for wholesale sourcing | Yes, for certified stones | Depends on parcel details |
IGI Certified Lab Grown Diamonds vs GIA Certified Lab Grown Diamonds
IGI and GIA are both searched by buyers comparing diamond certificates. IGI is widely used in the lab grown diamond market, while GIA is a highly recognised name across the diamond industry. The best choice depends on buyer preference, availability, report details, and market requirements.
Buyers should not choose only by the laboratory name. They should compare the actual diamond and the actual report. A well-cut, properly graded IGI certified lab grown diamond can be a strong choice. A GIA certified lab grown diamond can also be suitable if the buyer prefers GIA reporting.
| Factor | IGI Certified Lab Grown Diamond | GIA Certified Lab Grown Diamond |
|---|---|---|
| Recognised grading lab | Yes | Yes |
| Common in lab grown market | Very common | Available, buyer preference varies |
| Useful for comparison | Yes | Yes |
| Should report be verified? | Yes | Yes |
| Should buyer compare full specs? | Yes | Yes |
IGI Certified Lab Grown Diamonds vs Natural Diamonds
IGI certified lab grown diamonds and certified natural diamonds can both be real diamonds, but their origin is different. A lab grown diamond is created in a laboratory. A natural diamond forms underground.
The IGI certificate helps identify the diamond’s origin and specifications. This is important because lab grown and natural diamonds may look similar to the naked eye. The certificate makes the difference clear.
| Feature | IGI Certified Lab Grown Diamond | Certified Natural Diamond |
|---|---|---|
| Real diamond | Yes | Yes |
| Origin | Laboratory-grown | Earth-formed |
| Certificate | Shows lab grown origin | Shows natural origin |
| Price | Usually more accessible | Usually higher |
| Resale expectation | Usually lower | Usually stronger |
| Best for | Value, size, modern sourcing | Rarity, mined origin, tradition |
IGI Certified Loose Lab Grown Diamonds
IGI certified loose lab grown diamonds are ideal for buyers who want to choose the exact stone before it is set into jewellery. Loose stones give buyers more control over shape, carat, colour, clarity, certificate, measurements, and price.
For engagement rings, choosing the loose diamond first is often the best approach because the centre stone carries most of the visual impact. For earrings, matched loose diamonds can be selected for size and appearance. For wholesale, loose certified stones help jewellers and retailers source diamonds for customer orders and inventory.
| Loose Diamond Use | Why IGI Certification Helps |
|---|---|
| Engagement rings | Confirms centre stone details |
| Earrings | Helps match pairs |
| Pendants | Confirms quality before setting |
| Bracelets | Supports consistent sourcing |
| Custom jewellery | Helps design around the stone |
| Wholesale | Makes trade comparison easier |
IGI Certified Lab Grown Diamonds for Engagement Rings
IGI certified lab grown diamonds are popular for engagement rings because buyers can choose a real diamond with clear grading information. The certificate helps confirm the centre stone’s specifications before it is set.
For engagement rings, buyers should focus on cut quality, shape, face-up appearance, colour, clarity, and certificate. The best diamond is not always the highest grade. It is the diamond that looks beautiful, fits the design, and matches the buyer’s budget.
| Engagement Ring Shape | IGI Buying Note |
|---|---|
| Round | Check cut grade and brilliance |
| Oval | Check bow-tie and length-to-width ratio |
| Emerald | Check clarity and step-cut appearance |
| Cushion | Check shape outline and sparkle |
| Radiant | Check brilliance and proportions |
| Pear | Check symmetry and bow-tie |
| Marquise | Check length and tip protection |
IGI Certified Lab Grown Diamonds for Earrings
For earrings, IGI certification is useful when the stones are larger or when buyers want clear grading. Matching matters more than choosing two random stones. A pair should look balanced in size, colour, clarity, and sparkle.
For smaller stones, certification may depend on size and buying purpose. For larger stud earrings, many buyers prefer certified stones because they want confidence in the pair.
| Earring Type | What to Check |
|---|---|
| Stud earrings | Matching diameter, colour, clarity, and certificate |
| Bridal earrings | Bright appearance and balance |
| Drop earrings | Shape and movement |
| Hoop earrings | Consistent small stones |
| Statement earrings | Larger certified stones |
IGI Certified Lab Grown Diamonds Wholesale
Wholesale buyers often search for IGI certified lab grown diamonds because certification helps them sell, explain, and compare stones. Jewellers, retailers, manufacturers, and designers may need certified stones for engagement rings, customer orders, retail inventory, or high-value jewellery.
Wholesale IGI certified lab grown diamonds may include single stones, matched pairs, and specific grade combinations. For smaller diamonds and melee, buyers may request parcel specifications instead of individual reports depending on the size and use.
| Wholesale Buyer | Why IGI Certified Diamonds Help |
|---|---|
| Jewellers | Easier to explain quality to clients |
| Retailers | Better sellable inventory |
| Designers | Clear specifications for custom pieces |
| Manufacturers | Useful for repeatable production |
| Export buyers | Supports documentation and comparison |
| Engagement ring sellers | Helps build customer trust |
IGI Certified Lab Grown Diamond Prices
IGI certified lab grown diamond prices depend on carat weight, cut, colour, clarity, shape, measurements, polish, symmetry, fluorescence, availability, and market demand. Certification helps buyers compare diamonds, but the certificate alone does not decide price.
Two IGI certified lab grown diamonds with the same carat weight can have different prices. One may have a better colour grade, better clarity, better cut, or more desirable measurements. Buyers should compare similar diamonds before deciding.
| Price Factor | Why It Matters |
|---|---|
| Carat weight | Larger diamonds usually cost more |
| Cut quality | Better sparkle can increase value |
| Colour grade | More colourless grades usually cost more |
| Clarity grade | Higher clarity usually costs more |
| Shape | Demand and cutting yield affect price |
| Measurements | Face-up size matters |
| Certification | Helps verify and compare |
| Availability | Live market stock affects pricing |
1 Carat IGI Certified Lab Grown Diamonds
A 1 carat IGI certified lab grown diamond is a popular choice for engagement rings, pendants, and earrings. It offers a classic size while allowing buyers to compare quality clearly through the report.
When buying a 1 carat IGI certified lab diamond, check the shape, measurements, cut, colour, clarity, polish, symmetry, and price. Do not choose only by carat weight.
| 1 Carat Buying Factor | Why It Matters |
|---|---|
| Cut | Controls sparkle |
| Colour | Affects whiteness |
| Clarity | Affects visual cleanliness |
| Measurements | Shows face-up size |
| Certificate | Confirms grading |
| Shape | Controls style |
2 Carat IGI Certified Lab Grown Diamonds
A 2 carat IGI certified lab grown diamond is often chosen for larger engagement rings and premium jewellery. At this size, quality differences become more noticeable. Buyers should check colour, clarity, cut, and measurements carefully.
Oval, round, radiant, emerald, cushion, pear, and marquise are all popular 2 carat lab grown diamond shapes. The best choice depends on style, setting, and budget.
| 2 Carat Buying Factor | Why It Matters |
|---|---|
| Colour | More visible in larger stones |
| Clarity | Inclusions may be easier to see |
| Cut | Strongly affects beauty |
| Shape | Changes face-up size |
| Certificate | Important for comparison |
| Supplier guidance | Helps avoid poor selection |
Common Mistakes When Buying IGI Certified Lab Grown Diamonds
The biggest mistake is assuming that certification alone makes a diamond perfect. Certification is important, but it does not automatically mean the diamond is the best choice. Buyers must still compare the full specifications and appearance.
Another mistake is comparing diamonds unfairly. A 2 carat IGI certified oval diamond should not be compared directly with a 2 carat IGI certified emerald diamond unless the buyer understands the shape differences. Different shapes, proportions, and clarity visibility can affect price and appearance.
| Mistake | Better Approach |
|---|---|
| Buying only because it is certified | Compare the actual grades and appearance |
| Choosing only by carat | Check cut, colour, clarity, and measurements |
| Ignoring report number | Verify certificate details |
| Ignoring shape differences | Compare similar shapes fairly |
| Ignoring cut quality | Prioritise sparkle and proportions |
| Buying only by lowest price | Check quality and supplier trust |
| Not checking origin | Confirm the diamond is lab grown |
How to Buy IGI Certified Lab Grown Diamonds Online
Buying IGI certified lab grown diamonds online can be safe when the buyer checks the right details. A good listing should provide the certificate, report number, diamond specifications, measurements, and clear communication.
For wholesale or larger purchases, buyers should contact the supplier directly to confirm current availability, pricing, and certificate details. Live inventory can change quickly, so it is important to confirm before finalising.
| Online Buying Checklist | Why It Matters |
|---|---|
| IGI report available | Confirms grading |
| Report number visible | Helps verification |
| Full 4Cs listed | Supports comparison |
| Measurements shown | Helps judge size |
| Origin disclosed | Confirms lab grown status |
| Price provided or quoted | Supports decision-making |
| Supplier contact available | Allows questions |
| Current availability confirmed | Prevents unavailable stone issues |
Buyer Checklist for IGI Certified Lab Grown Diamonds
| Checklist Question | What to Confirm |
|---|---|
| Is the diamond IGI certified? | Confirm report details |
| Does the report state lab grown origin? | Yes |
| Does the shape match the report? | Yes |
| Does carat weight match? | Yes |
| Are colour and clarity listed clearly? | Yes |
| Are measurements suitable? | Check face-up size |
| Is the diamond suitable for the jewellery design? | Yes |
| Is the price based on current availability? | Yes |
| Is the supplier transparent? | Yes |
Why Choose Uniglo Diamonds?
Uniglo Diamonds helps buyers source certified lab grown diamonds with clear specifications and professional support. Whether you are looking for an IGI certified loose lab grown diamond, a centre stone for an engagement ring, matched diamonds for earrings, or wholesale lab grown diamonds for jewellery production, Uniglo Diamonds can help you compare available options.
The right IGI certified lab grown diamond should match your purpose, budget, certificate preference, and quality expectations. Uniglo Diamonds focuses on helping buyers understand the stone before making a decision.
Basic IGI Certification
IGI Report
Buying
IGI vs GIA
Price
Loose Diamond
Wholesale
Final Summary
IGI certified lab grown diamonds give buyers a clearer way to compare diamond quality, origin, and value. The certificate helps confirm that the diamond is laboratory-grown and provides important details such as carat, colour, clarity, measurements, polish, symmetry, and fluorescence.
For engagement rings, loose diamonds, earrings, custom jewellery, and wholesale sourcing, IGI certification can make the buying process more transparent and confident. The best approach is to compare the full report, verify details where possible, and choose a supplier that communicates clearly.
Uniglo Diamonds helps buyers source IGI certified lab grown diamonds, loose stones, matched pairs, and wholesale options based on current availability and specific requirements.

