Blog
Market reports and commentary.
Diamond pricing software vs spreadsheets: where quotes go wrong
Diamond pricing software fixes what a spreadsheet cannot — where static quotes drift on certificates, carat buckets, regions, and lab-grown moves.
How to reprice diamond inventory without losing margin
Segment-aware diamond inventory repricing beats a portfolio average — when to reprice, which stones to lock, and how to read a session before you apply it.
April 2026 diamond market report: lab-grown gap widens at the top
April 2026 diamond prices split by segment: bridal naturals softened against lab-grown, while `2.00ct+ D VVS1+` investment stones held firm.
The lab-grown gap this month: where natural still holds its premium
May 2026 reads the lab grown price gap as two markets, not one - wide on investment-grade naturals, tight in the bridal band. Here is the segment split.
VS1 vs VS2 clarity: the price gap that keeps shrinking
VS1 vs VS2 used to print a clean 5–8% per-carat premium. In 2026 that spread is flattening across the bridal band - here's where it's still real.
Diamond price per carat in 2026: how the curve actually steps
What 1ct, 1.5ct, and 2ct round brilliants actually cost per carat in April 2026 - the bucket-by-bucket curve, with the steps where price tiers change.
The 0.99 vs 1.00ct jump: why magic carat sizes still print money
A stone that crosses 1.00ct is not just 0.01ct heavier - it lands in a different price tier. Here is why the magic-size premium is still real in 2026.
Lab-grown market share in 2026: the quiet inflection
Lab-grown now moves more bridal carats than natural in some segments. The dollar share tells a different story - here is what to price against.
GIA vs IGI: what the 2025 grading shift means for your prices
Lab-grown grading consolidated around IGI and GIA in 2025. Here is what changed in the data and how to read it when pricing stones.
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Stone Insights opens a public reference library for diamond market intelligence - blog, encyclopedia, and structured lessons.