Diamond Critics
Shop Blue Nile →

Expert Guides · GIA-Backed · Free Analysis

Diamond Reviews & Buying Guides.Save Thousands.

Expert diamond reviews, clarity guides, color grading, and price comparisons. GIA-backed analysis by Farzana Hasan — trusted by buyers in the US, UK, Canada, and Australia.

As Seen In

ForbesBusiness InsiderYahoo FinanceMSN

Recommended Retailer

Blue Nile — Vault Sale

Up to 40% off select diamonds →

ExploreGuidesClarityColorShapesReviewsPricesLab vs Natural4Cs Guide

Trusted Retailer

Where to Buy Diamonds

All Reviews →
Blue Nile

Expert Score

4.6/ 5.0
★★★★★

Audited by Farzana Hasan, GIA Expert

Best Overall 2026

The world's largest GIA-certified diamond inventory. Since the 14% market correction, Blue Nile offers Oval and Cushion cuts thousands below Round Brilliant floor prices.

200K+

GIA Diamonds

40%

Below Mall

4.6★

Expert Score

Expert Content

Latest Guides

AllBuying GuideClarityColorShapesRetailer ReviewMarket & Price
Round Diamond vs Oval Diamond: The 2026 Verdict Nobody Gives You

Round Diamond

Round Diamond vs Oval Diamond: The 2026 Verdict Nobody Gives You

Every 'round vs oval' article ends with 'it's personal preference.' Mine doesn't. One shape wins on sparkle, one wins on price, and the bow-tie problem affects over half of all ovals sold. Here is the actual verdict.

Jun 20, 2026Read guide →

Diamond Guides

Browse All Guides

All Guides →
View All Buying Guides

Interactive Tool

Natural or Lab-Grown? Can you tell?

Same color. Same clarity. One costs $8,140 — the other $1,870. Discover which is right for you.

Read the Full Breakdown →