IGI vs. GIA: Which Diamond Certification Is Best?
When it comes to buying a diamond, especially for a custom engagement ring, understanding certification is key. At Teresa and Sons, your trusted Montreal jeweller, we often get asked: What’s better—IGI or GIA certification? The answer depends on what matters most to you: value, strict grading, or turnaround time for custom jewellery.
Let’s break it down so you can make the most informed decision for your Montreal custom engagement ring.
What Is Diamond Certification?
Diamond certification is a report from an independent gemological lab that verifies the quality of your diamond. It covers critical details like cut, clarity, color, and carat weight—often referred to as the 4 Cs.
At Teresa and Sons, we work with both GIA and IGI diamonds to suit every need, budget, and preference for your custom ring or custom jewellery in Montreal.
What Is GIA?
The Gemological Institute of America (GIA) is widely considered the gold standard for diamond grading. Known for its strict standards and consistency, GIA is highly trusted in the global jewelry industry.
Pros of GIA-certified diamonds:
- Renowned for accurate, conservative grading
- Holds higher resale and trade-in value
- Ideal for natural diamonds
- Preferred for premium custom rings
If you're creating a Montreal custom engagement ring with a natural diamond, GIA might be the better choice, especially for investment pieces.
What Is IGI?
The International Gemological Institute (IGI) is a respected global lab and a top choice for lab-grown diamonds. IGI tends to be more flexible in its grading and offers faster certification times, which is helpful for clients on tighter timelines.
Pros of IGI-certified diamonds:
- More affordable certification
- Often used for lab-grown diamonds
- Faster turnaround time for grading
- A great option for custom and fashion jewelry
If you’re creating a custom ring or Montreal custom jewellery with a lab diamond, IGI offers excellent value and availability.
Which One Should You Choose?
The choice between IGI and GIA depends on your diamond type and priorities:
- Choose GIA if you want strict grading, high resale value, and a trusted report—especially for natural stones.
- Choose IGI if you’re opting for a lab-grown diamond or want more flexibility on budget without sacrificing beauty.
At Teresa and Sons, we’ll walk you through both options to ensure your diamond is perfect—whether you’re designing a one-of-a-kind Montreal custom engagement ring or a stunning custom pendant or bracelet.
Trust Teresa and Sons: Your Montreal Jeweller for Certified Diamonds
As a leading Montreal jeweller, Teresa and Sons offers certified GIA and IGI diamonds to suit all budgets and preferences. Our expert team will help you choose the right stone and certificate, and we’ll guide you through the full process of creating your dream custom engagement ring or Montreal custom jewellery piece.
Visit our showroom or schedule a design consultation today—we’ll help you find (or build) the certified diamond that tells your love story.
