Lucy's Diamond Insights
Deep market analysis, price trends, and diamond buying intelligence from Lucy, our resident diamond market analyst.
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IGI vs GIA grading on lab-grown diamonds: what 67,000 oval cohorts reveal
Across 66,477 lab-grown D VVS2 ovals graded by IGI or GIA and tracked at active retailers in the Carat Hunter index, the IGI median price is $1,206 and the GIA median price is $1,978.
Published 8 February 202610 min read
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Deep DiveGIA's Premium-Standard pivot: what 335,669 lab-grown stones reveal about the new tier system
GIA shifted lab-grown diamond reports from the traditional D-Z color and FL-I3 clarity scales to a binary Premium-Standard tier system effective October 1, 2025.
Published 25 January 202610 min read
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Deep DiveCross-retailer diamond pricing: what 4.7 million matched listings reveal
Across 4,704,553 certified diamonds tracked at two or more retailers in the Carat Hunter index, the average price spread is $1,592 per stone.
Published 11 January 20269 min read
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