Ruby Origin Premiums 2026 — Burma vs Mozambique vs Thailand
A 3-carat fine unheated ruby with the Burma (Mogok) line on an SSEF or Gübelin report trades at $80,000–$250,000 per carat at top houses. The same colour and clarity with the Mozambique (Montepuez) line on the same lab's report trades at $15,000–$45,000. The same stone again with the Thailand line trades under $4,000. The country call on the report is doing roughly half the work in the per-carat price — and it only exists if a named lab has signed for it.
Burma (Mogok and Mong Hsu) — the prestige origin
Mogok, in the Mandalay region of Myanmar, is the historic marble-hosted ruby source. The geology produces corundum with strong chromium fluorescence, very fine rutile silk, and the pure red with slight bluish secondary the trade calls pigeon blood. Almost every iconic ruby at auction over the last century traces to Mogok. Mong Hsu, in Shan State, is the modern high-volume source discovered in the late 1980s; most Mong Hsu material carries a blue or purple core removed by heat treatment, so the typical Mong Hsu ruby on the market is heated.
Both read as "Burma (Myanmar)" on a SSEF, Gübelin, AGL, GRS or GIA report. The named labs can in many cases separate Mogok from Mong Hsu off inclusion fingerprint and trace-element chemistry, and a stated Mogok provenance carries a meaningful premium on top of the Burma call. The colour-grade callouts that pair with Burma origin: "pigeon's blood red" on the Gübelin report, "vivid red" on SSEF, and the spectroscopically defined "Pigeon Blood" grade on GRS.
Mozambique (Montepuez) — the modern volume origin
The Montepuez deposit in Cabo Delgado Province came online at scale in 2009 and is now the dominant source of fine ruby on the market by weight. Geology is gneissic (amphibolite-hosted) rather than marble-hosted, which gives Mozambique stones a higher iron content, slightly weaker fluorescence, and a tendency toward a marginally cooler red. At top colour the visible difference between a fine Mozambique and a fine Burma is small — the labs separate them on chemistry.
Investment-grade Mozambique ruby exists. Fine unheated Montepuez at 3 ct+ with SSEF, Gübelin, AGL or GRS paper has appreciated roughly 6–9% per carat per year since 2016, and individual auction lots have set records for non-Burma ruby. The structural difference is supply: Montepuez is an active large-scale operation backed by a publicly listed mining group, where Mogok is mature and constrained.
Thailand — the commercial-grade ceiling
Thai ruby (from Chanthaburi and the historic Trat deposits) carries higher iron, lower chromium, and a darker, less-fluorescent red. Almost all material on the market is heated. The combination of geological colour ceiling, near-universal heat treatment, and a 2,000-year reputation as the commercial-grade source caps the per-carat band even for fine material. Thai-origin stones rarely appear in top-house investment-grade catalogues; the trade for them runs through the Chanthaburi and Bangkok dealer markets and into commercial fine jewelry rather than auction.
2026 per-carat ranges side by side
| Origin | Tier (3 ct+, unheated, SSEF / Gübelin) | Approx. per-carat (USD) |
|---|---|---|
| Burma (Mogok) | Top pigeon blood, footnoted Mogok | $80,000–$250,000+ |
| Burma (unspecified) | Fine pigeon blood, Burma call only | $40,000–$120,000 |
| Mozambique (Montepuez) | Top colour, unheated | $15,000–$45,000 |
| Mozambique (heated) | Top colour, lab-stated heat | $4,000–$15,000 |
| Thailand | Fine red, heated | $1,500–$4,000 |
Lab-report lines that move the band
- Country call — the single largest variable. Burma carries the 4–6x premium at the top tier over Mozambique; Mozambique carries a 4–10x premium over Thailand at comparable colour.
- Mining-region footnote — "Mogok" on a Burma report adds 20–40% over an unspecified Burma call. "Mong Hsu" typically caps the stone below the Mogok band even at the same colour grade.
- Treatment line — "no indications of heating" (SSEF, Gübelin) is the prestige tier and prints the top-band per-carat figure. "Indications of heating" drops the band 3–8x for fine material. "Lead-glass filling" is disqualifying — the stone is a composite traded by weight at industrial prices.
- Colour-grade callout — "pigeon's blood red" (Gübelin), "vivid red" (SSEF), "Pigeon Blood" (GRS, defined spectroscopically). A retailer claim of pigeon blood with no lab citation is a marketing line and carries no auction-market weight.
Frequently asked questions
How much more does Burma ruby cost than Mozambique ruby?
At top colour, fine unheated, 3 ct+ with SSEF or Gübelin paper, Burma ruby trades at $80,000–$250,000 per carat (Mogok provenance at the top of that band) versus $15,000–$45,000 per carat for the same colour and clarity from Mozambique. That is a 4–6x multiple at the top tier, narrowing to roughly 2–3x in the middle of the colour band and disappearing entirely in commercial grades.
How does a lab actually determine ruby country of origin?
By trace-element chemistry and inclusion fingerprint. SSEF, Gübelin, AGL and GRS each maintain a reference population of ruby samples from documented mining sites. The lab measures iron, titanium, vanadium, chromium and gallium ratios on a laser-ablation ICP-MS, then matches the reading against the reference. Inclusion microscopy (rutile silk patterns, calcite or apatite crystals, specific healing-fissure morphologies) corroborates the chemistry. The conclusion is stated as an opinion ("Burma (Myanmar)") and is backed by the lab's testing methodology, not by export documentation from the mine.
What is the difference between Mogok and Mong Hsu on a Burma report?
Both read as "Burma (Myanmar)" — labs that can separate the two in many cases footnote it. Mogok (Mandalay region) is the historic marble-hosted source that produced the classic pigeon-blood stones at auction; Mong Hsu (Shan State) is the modern high-volume source discovered in the late 1980s and almost always heated to remove a blue core. SSEF, Gübelin, AGL and GRS can in many cases call Mogok versus Mong Hsu off the inclusion pattern, and Mogok provenance adds another 20–40% over an unspecified Burma call.
Is Mozambique ruby a good investment?
For top-colour stones with the Montepuez line on an SSEF, Gübelin, AGL or GRS report and a clean unheated designation, yes — but at a different band. Per-carat appreciation since the deposit came online in 2009 has been real (roughly 6–9% CAGR through 2026) but the absolute price level is a small fraction of Burma comparables. The risk is that the supply curve from Montepuez is structurally different from Mogok's — Mozambique is an active large-scale operation, Mogok is mature and constrained.
Why is Thai ruby so much cheaper than Burma at the same colour?
Thai ruby (from Chanthaburi and the historic Trat deposits) typically carries higher iron and lower chromium, which gives a darker, less fluorescent red — the colour drops out of the pigeon-blood band. Almost all market Thai ruby is heated. The combination of geological colour ceiling, near-universal heat treatment, and a 2,000-year reputation as the commercial-grade source caps the per-carat band at $1,500–$4,000 even for fine material.
Read alongside
- Investing in colored gemstones (pillar) — the parent field guide covering origin premiums and lab-report decoding across ruby, sapphire and emerald.
- Sapphire origin premiums — Kashmir, Ceylon, Madagascar — the sapphire-side equivalent of this page.
- Burma ruby origin deep-dive — single-origin treatment of Mogok and Mong Hsu, with full colour-grade detail.
- Ruby as investment — returns, storage, insurance — the returns-and-vaulting companion page to the origin-premium framework above.