Gemstone district
Mogok Stone Tract
Mogok is a historically important, marble-associated ruby district; the marker is an approximate locality reference, not a mine coordinate.
Evidence-backed overview
The place, clearly defined
A multi-valley gemstone district in Myanmar historically associated with ruby and a wide range of other gem materials.
For centuries, the Mogok Stone Tract has been one of the best-known sources of fine ruby.
- Alternate & historical names
- Mogok Gem Tract alternateValley of Rubies historical
Geological context
How the occurrence is understood
Ruby is associated with crystalline limestone or marble and with secondary material weathered from those host rocks.
Bidirectional relationships
Documented gemstones
Occurrence and production are separate claims. A production label is date-bounded and does not guarantee quality, origin determination, or market value.
Ruby
Evidence identifies the location as commercially or historically important for this gem.
Centuries of production are documented. Current operating status is intentionally not inferred from older sources.
Spinel
Authoritative evidence documents production in a past period; present activity is not implied.
GIA field reporting documents spinel mining in the Mogok Stone Tract.
Blue Sapphire
Authoritative evidence documents production in a past period; present activity is not implied.
GIA field reporting documents sapphire mining in the Mogok Stone Tract.
Peridot
Authoritative evidence documents production in a past period; present activity is not implied.
GIA field reporting documents peridot mining in the broader Mogok area.
Amethyst
Authoritative evidence documents production in a past period; present activity is not implied.
GIA field reporting documents amethyst production in the Mogok Stone Tract.
Garnet
Authoritative evidence documents production in a past period; present activity is not implied.
GIA field reporting documents garnet production in the Mogok Stone Tract.
Zircon
Authoritative evidence documents production in a past period; present activity is not implied.
GIA field reporting documents zircon production in the Mogok Stone Tract.
Moonstone
Authoritative evidence documents production in a past period; present activity is not implied.
GIA field reporting documents moonstone production in the Mogok Stone Tract.
Time-aware evidence
Production & history
Centuries of production are documented. Because the principal public sources used here are historical or field reports, current activity is shown as uncertain rather than assumed.
Historic production documented
The reviewed GIA source describes centuries of ruby production. The end year here identifies the evidence publication date, not a claim that mining ended then. [1]
Mogok becomes a defining ruby source
Historical literature reviewed by GIA describes Mogok as a central source of fine ruby over many centuries. [1]
Spatial context
Map & coordinate precision
Approximate marker uses the GeoNames position for Mogok town; it does not identify a mine, deposit boundary, or individual working.
- Precision class
- Approximate locality position
- Public coordinates
- Approximately 22.92, 96.51
- What this means
- Marker represents the named locality or nearby town; it is not an exact working.
Evidence ledger
Sources & verification
Sources are deduplicated across the geographic record. Current-production claims receive explicit review dates; a map point never substitutes for geological or production evidence.
- [1]Peter C. Keller. The Rubies of Burma: A Review of the Mogok Stone Tract.
Gems & Gemology · 1983
View authoritative source - [2]Vincent Pardieu, Andrew Lucas, and GIA field team. Mogok Expedition Series, Part 1: The Valley of Rubies.
Gemological Institute of America · 2014
View authoritative source - [3]Palke et al.. Geographic Origin Determination of Ruby.
Gems & Gemology · 2019
View authoritative source - [4]GeoNames contributors. GeoNames: Mogok, Myanmar.
GeoNames · 2026
View authoritative source