SAPPHIRE BANKSapphire Market Report
This report covers the H1 2026 performance review and Q3 auction season outlook for investment-grade coloured gemstones. Our June report documented Ceylon sapphires up 10% YoY and a 30% surge in Kashmir enquiries — both trends have accelerated through July.
H1 2026 REVIEW
The first half of 2026 delivered stronger returns across investment-grade coloured gemstones than most market participants anticipated at the start of the year. The key divergence was between the top of the market — where certified, unheated, origin-confirmed stones continued to attract institutional-grade capital — and the commercial mid-market, which remained largely flat.
The bifurcation between certified investment-grade material and uncertified commercial stones widened considerably in H1. This is a structural trend rather than a cyclical one: institutional buyers and family offices — which now represent a meaningful share of fine stone demand — have non-negotiable certification requirements. Uncertified material is effectively excluded from this capital pool.
UNHEATED PREMIUM: WIDENING FURTHER
The most significant structural trend in July's data is the continued widening of the unheated premium. Our market tracking shows that the price multiple for unheated vs equivalent-quality heated Ceylon sapphires has expanded from approximately 2.5x at the start of 2025 to 3.2x today.
Three forces are driving this:
- 1.Tighter lab standards. GRS and SSEF have progressively raised the evidentiary bar for “no heat” determinations. The proportion of submitted stones receiving the designation has declined, making existing certified “no heat” stones scarcer at the margin.
- 2.Institutional non-negotiables. Gemstone funds and institutional buyers treat “no heat” as a hard filter. Heated stones — however beautiful — do not qualify for their mandates.
- 3.Holder reluctance. Owners of top unheated certified stones are increasingly reluctant to sell at current prices, anticipating further appreciation ahead of Q3 auctions.
For a detailed breakdown of what drives the unheated premium, see our analysis of the unheated sapphire premium.
JULY CEYLON SAPPHIRE PRICE UPDATE
The 5–10ct cornflower/royal blue segment — already at +17% in our June report — has moved to +19% YoY. Our global network now tracks fewer than five stones in this specification available for private enquiry globally. The 10ct+ tier is effectively off-market: three known transactions in H1 2026, all through private channels with no disclosed pricing.
BURMA RUBY: H1 STANDOUT PERFORMER
The most significant surprise of H1 2026 was the performance of top-tier Burma rubies. GRS-certified pigeon-blood specimens above 2 carats appreciated approximately 15% in H1 — well ahead of our January forecast of 8–10%.
The drivers are clear: sustained demand from Southeast Asian and Middle Eastern buyers, for whom red stones carry deep cultural premium value; supply constraints from Myanmar, where political instability continues to disrupt rough production and export logistics; and growing awareness among European family office investors that fine Burma rubies have historically delivered comparable or superior returns to Kashmir sapphires on a per-carat basis.
For buyers considering ruby diversification, our ruby investment guide details the pricing differential between Burma and Mozambique origin and the certification factors that drive premium valuation.
SOTHEBY'S SEPTEMBER SALE: PREVIEW
Sotheby's Geneva has confirmed its annual coloured stone sale for September 2026. Based on our industry contacts, the sale is expected to include:
- —At least three Kashmir sapphires, including one exceeding 10 carats — an exceptionally rare size for public sale.
- —Five to seven investment-grade Ceylon sapphires, the majority with GRS or Gübelin certificates.
- —Two GRS-certified pigeon-blood Burma rubies above 3 carats.
- —A GRS-certified padparadscha sapphire — a segment that has seen very limited public auction supply in recent years.
The results of this sale will set price benchmarks for the remainder of the year. Historically, a strong September Sotheby's coloured stone sale translates into upward adjustment in private market asking prices over the following 3–6 months.
For buyers planning to participate directly, our guide to how gemstone auctions work covers the full cost structure, including the 26–27% buyer's premium on the first $200,000 of hammer price.
DIGITAL ASSET INVESTORS IN THE GEMSTONE MARKET
A trend worth noting: since Q4 2025, we have observed a meaningful increase in enquiries from buyers with cryptocurrency or digital asset backgrounds. Their stated rationale is consistent: physical asset, no custodial counterparty risk, global portability, and a store of value uncorrelated to equity and bond markets.
Investment-grade certified gemstones score well on all these criteria. This buyer group tends to be highly price-transparent in their expectations — accustomed to 24-hour real-time pricing — and therefore asks detailed questions about historical transaction data and comparable pricing. This is a healthy development for market transparency overall.
We expect this buyer cohort to grow as a share of demand for investment-grade coloured stones through 2026 and beyond, providing structural support to the top end of the market.
Q3 2026 OUTLOOK
Price trajectory: We expect a further 3–5% appreciation in Q3 for fine certified Ceylon sapphires. Burma rubies, supported by continued strong demand, should add 2–4%. Kashmir sapphire prices will be heavily influenced by the September auction results and may show significant individual-stone variance.
Certification timelines: GRS Bangkok processing times have improved slightly to five to seven weeks for standard submissions (down from six to eight weeks in June). Rush-service turnaround remains two to three weeks but carries a substantial premium. Factor certification timing into acquisition planning if you have a specific completion deadline.
Demand structure: Asian buyers — particularly Singapore, Hong Kong, and the Gulf states — continue to dominate the top end of the market. European and North American demand shows the usual summer slowdown in July–August but the underlying demand structure remains healthy.
Risk factors: Global luxury consumption confidence remains the primary macro risk. Any significant deterioration in high-net-worth spending sentiment — particularly in Asia — would be a headwind. That said, the structural supply constraints driving appreciation at the quality end are not macro-sensitive.
FREQUENTLY ASKED QUESTIONS
What is happening in the sapphire market in July 2026?
Fine Ceylon sapphires are up 12% year-on-year, accelerating from 10% in June. The unheated premium has widened to a 3.2x multiple over equivalent heated stones. Burma rubies were the standout performer of H1 2026, up 15% YoY. The market is bifurcated: certified investment-grade material appreciates strongly; uncertified commercial stones are effectively flat.
What is Sotheby's September 2026 sapphire auction expected to include?
The Sotheby's Geneva September sale is expected to feature at least three Kashmir sapphires — one exceeding 10 carats — five to seven investment-grade Ceylon sapphires, two GRS-certified pigeon-blood Burma rubies, and a GRS-certified padparadscha. Results will set 2026 price benchmarks for the private market.
Why is the unheated sapphire premium continuing to widen?
Three factors: GRS and SSEF's progressively stricter 'no heat' determination standards (fewer stones qualifying); institutional buyers treating no-heat as a non-negotiable hard filter; and existing holders of top unheated certified stones increasingly reluctant to sell ahead of anticipated Q3 auction-driven price uplift.
Is now a good time to buy investment-grade gemstones?
Historically, buying comparable-quality stones through private channels before major auction results is more cost-effective than buying after. Successful auction results consistently push private market asking prices higher. For buyers with a clear acquisition target, the window before the September sale is relatively favourable. The structural supply constraints driving appreciation are not reversible — waiting for lower prices in certified investment-grade material has not been a rewarding strategy.
How do Burma rubies compare to Ceylon sapphires as investments?
Top GRS-certified Burma rubies and Kashmir/fine Ceylon sapphires are comparable as investment-grade assets: both benefit from permanently fixed supply, cultural premium demand from Asia and the Middle East, and strong certification infrastructure. Burma ruby H1 2026 performance (+15%) actually outpaced fine Ceylon sapphires (+12%). Diversifying across both provides exposure to slightly different buyer pools.