Global pricing trends, supply developments, and rare gemstone market insights for institutional investors, family offices, and private collectors.
D-IF Diamond (1ct)
YTD 2026
Burma Ruby (5ct+)
Q1 2026
Kashmir Sapphire
Last 12mo
Gold ($/oz)
YTD 2026
Platinum ($/oz)
YTD 2026
Price Trends
D-IF Diamond (1ct)
$4,890/ct
+12.3% YTD 2026Data represents GSBH proprietary market index. Not financial advice. All figures are indicative.
Research
Colored gemstones have outperformed traditional asset classes over a 20-year horizon, particularly untreated specimens with certified provenance from premium origins.
Laboratory-grown diamond supply pressure continues, while natural D-IF stones maintain price premium. The sub-2ct market shows bifurcation between commercial and collector-grade material.
Historical Burmese ruby mines remain largely depleted. Post-sanctions Burmese material represents the primary new supply, though origin verification protocols have become increasingly critical.
A comparative analysis of storage costs, liquidity, price transparency, authentication requirements, and historical return profiles across precious metals and rare gemstones.
News Feed
18.04ct Kashmir Sapphire achieves $4.2M at Geneva auction — highest per-carat for Kashmir material since 2024
Mozambique ruby production drops 18% YoY as Montepuez reserves face depletion pressure
10.14ct unheated Burma ruby sells for $3.8M, establishing new price benchmark for sub-12ct stones
New spectroscopic protocol identifies previously undetectable beryllium treatment in sapphire — market implications significant
Diamond demand in China recovers Q4 2025 — Tier-1 natural stones see renewed institutional interest
Edwardian emerald necklace with Colombian origin cert achieves 240% above estimate at London sale
Family offices increase allocation to "tangible luxury assets" — gemstones cited as preferred vehicle over watches and art
Commentary
"The supply of untreated Burmese rubies continues to tighten as historical mines remain largely depleted. Certified no-heat specimens from verified Mogok Valley origin command a 3–5× premium over comparable heated material."
"Kashmir sapphires represent perhaps the most significant supply/demand imbalance in the rare gemstone market. With no meaningful new production since the late 1920s, every fine specimen is effectively irreplaceable."
"The institutional market for investment-grade colored stones is maturing. Family offices and private banks are increasingly requiring certified provenance, independent appraisal, and ongoing portfolio monitoring as standard conditions."
Market intelligence is prepared for institutional reference only. Past performance is not indicative of future results. Gemstone valuations are subject to market conditions, authentication status, and specimen-specific factors.
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