Blog
Market reports and commentary.
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.