SAPPHIRE MARKET REPORT

The June 2026 coloured stone market is defined by one dominant dynamic: institutional and high-net-worth buyers positioning ahead of the September auction season. Sotheby's, Christie's, and Bonhams have all confirmed significant coloured stone specialists sales for September, and the pre-sale appetite is driving enquiry volumes meaningfully above the seasonal norm.

Fine Ceylon sapphires — GRS-certified, 2ct+, strong colour — are now up approximately 10% year-on-year, accelerating from the 8% we reported in May. Kashmir sapphire enquiries have increased approximately 30% month-on-month, a notable signal given how illiquid and privately traded that market typically is.

The bifurcation between investment-grade certified material and commercial uncertified stones continues to widen. Mid-market sapphires — 1–2 carats, heated, without premium certification — are showing flat-to-negative price trends, while the top of the market is accelerating. Buyers who understand this distinction are positioned well.

Kashmir sapphires are the headline story in June 2026. We received enquiries from three institutional buyers in early June, each seeking Kashmir material in the $200,000–$500,000 range — an unusual level of activity for a market that typically clears through private bilateral transactions.

The pricing logic for Kashmir is fundamentally different from any other origin. Supply is permanently fixed — every Kashmir sapphire in existence was mined over a century ago from a single deposit that is now inaccessible. Price is therefore a function of pure demand dynamics. Current auction records show top specimens achieving $150,000–$200,000+ per carat. For the complete picture, see our Kashmir sapphire price per carat guide.

The structural case for Kashmir as a store of value is straightforward: fixed supply, growing global wealth, increasing collector sophistication, and the irreplaceable aesthetic quality of the velvety cornflower-to-royal blue the deposit produced. These factors do not reverse. For a direct comparison of Kashmir vs Ceylon performance, see our Ceylon vs Kashmir sapphire guide.

The 5ct+ cornflower and royal blue category is now up 17% year-on-year — materially above our May estimate of 14%. This acceleration reflects the concentration of buyer activity at the top of the market ahead of the September auction season.

For full pricing context on blue sapphires across all origins and quality tiers, see our blue sapphire price per carat guide.

Based on our market tracking, we are aware of fewer than seven investment-grade cornflower blue Ceylon sapphires currently in the open market globally — defined as GRS-certified, unheated, 5ct+, with strong saturation and even colour distribution. This is down from approximately twelve stones six months ago, a 42% reduction.

The depletion reflects two factors. First, strong private market absorption — several significant stones have been acquired through direct dealer-to-buyer transactions before reaching public sale. Second, continuing quality deterioration at the Beruwala rough market: high-quality rough that yields clean 5ct+ finished stones is being found at a lower frequency than at any point in the past decade, according to our contacts in Sri Lanka.

For buyers seeking cornflower blue material specifically, the window to acquire at current prices is narrowing. We expect the September auction results to establish new price benchmarks for this category.

The unheated premium for fine Ceylon sapphires has expanded slightly in June, moving from the 30–50% range reported in May to 33–52%. This reflects increasing buyer sophistication among institutional and Asian buyers, who are specifically targeting unheated material and willing to pay more aggressively for it.

For investment purposes, we continue to recommend unheated material as the primary target. The premium has never meaningfully compressed below 25% over any 12-month rolling period, and the structural dynamics — certified scarcity, international auction recognition, collector preference — support its continuation. For more detail on why the unheated premium persists, see our analysis of the unheated sapphire premium.

September auction season: Sotheby's has confirmed a significant coloured stone sale for September. We expect it to feature at least two to three Kashmir sapphires and five to seven investment-grade Ceylon stones. Results will set price benchmarks for the rest of 2026.

Price trajectory: We expect further 3–5% appreciation in Q3 for fine certified Ceylon sapphires. Kashmir sapphires remain in a different category — their price is driven by individual stone dynamics and auction outcomes rather than broad market trends.

Certification backlogs: GRS Bangkok processing times remain at six to eight weeks for standard submissions. Plan acquisitions accordingly if certification completion is required for a specific timeline.

Risk factors: Global luxury consumption softening and currency movements remain the primary macro risks. We remain constructive on the structural demand picture for investment-grade coloured stones, with the caveat that auction markets can be volatile in the short term.