What to Look for in an IGI Certificate
Buying a diamond with an IGI certificate is smart—but there's more to look for than just the grade. Here are 8 essential checks that will empower you to judge value, quality, and service—and see why Rare Carat shines brighter than old‑school sellers like 1ctlabdiamonds.
What Is an IGI Report?
Although the GIA has long been the leader in grading natural diamonds—having pioneered much of the modern diamond grading equipment and methodology—the IGI has made a strong name for itself, especially in the grading of lab-created diamonds.
IGI does not officially categorize its reports by name, but based on the documents available through platforms like Rare Carat, we can generally identify two main types: a simplified report and a comprehensive report.
1. Certificates integrity beyond the grade
IGI certificates list your diamond’s 4Cs, but that is only part of the story. You should verify certificate authenticity, examine and fluorescence notes or treatments, and confirm there is no tampering. A trustworthy seller will also display certificate number transparently and offer guidance on interpreting it.
2. AI‑Powered Grading & Price Scoring
Rare Carat enhances IGI's grading by using AI-powered diamond grading & price scoring to estimate fair value—and produce a “Deal Score” so you can directly assess if the price truly matches the quality
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3. Free Reviews by certified gemologists
Even with an IGI report, you benefit from free reviews by certified gemologists, especially from GIA—trained experts, and Rare Carat offers these reviews via live chat or phone—-no sales pressure, just unbiased feedback on inclusions, polish and potential flaws and true sparkle MK Library.
4. Full‑Service Support from Start to Finish
Look for a platform that supports you beyond certification: search, checkout, resizing, returns, and follow‑up services. Rare Carat is a full‑service marketplace, not just a listing site—they handle everything from order to delivery and support
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5. 30 day money back guarantee
A valid IGI-certified diamond should come with layers of protection. Rare Carat provides a 30-day money-back guarantee and free insured shipping and returns, giving you time to inspect the ring in person risk‑free
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6. 1-Year Complimentary Resizing
One complimentary resizing is included within your first year. Eternity bands are not eligible for resizing after 30 days. Extended coverage is available through our care plan.
Your seller should offer resizing if the fit isn’t perfect. Rare Carat includes 1-Year Complimentary Resizing (except eternity bands after 30 days), and you can extend protection via a care plan. That ensures peace of mind post‑purchase.
7. Rated 4.9★ on Trustpilot and Google Business with thousands of reviews
Look for platforms that back their offerings with reputation. Rare Carat is rated 4.9★ on Trustpilot and Google Business, with thousands of glowing reviews praising transparency, price, and service
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. Contrast that with 1ctlabdiamonds—which has fewer public reviews and less clarity in policies.
8. Lifetime warranty options
Don’t just rely on what the IGI certificate covers. Rare Carat offers lifetime warranty options on diamonds and jewelry, protecting against manufacturing defects over time—many traditional sellers don’t offer such extended coverage.
📊 Rare Carat vs. 1ctlabdiamonds (Quick Comparison)
TL;DR
When evaluating an IGI certificate, don’t stop at the grade alone. Look at certified review services, pricing transparency, buyer protections, and ongoing support. Platforms like Rare Carat go beyond simple listing sites—they combine AI insights, expert gemologists, and customer first policies, like free resizing, and returns, and warranty, backed by stellar ratings.
