Geographic knowledge graph
Move from gem to country, district, deposit, and source—without confusing a documented occurrence with commercial production or an approximate marker with an exact mine.
Explore the graph
Every public relationship is evidence-gated. Production labels are time-aware, coordinates carry a precision classification, and the complete text directory remains available without the map.
Spatial view
Precision first: markers are regional or locality references unless a verified site classification explicitly says otherwise. No marker in this release is an exact mine coordinate.
Text alternative
Mogok is a historically important, marble-associated ruby district; the marker is an approximate locality reference, not a mine coordinate.
Montepuez is a major current ruby-producing area with primary and secondary deposits; the map point is deliberately regional.
Afghan pegmatites are documented sources of Beryl including Aquamarine.
The Anahí deposit is a documented source of natural Amethyst-Citrine zoning in veins within carbonate host rock.
National Diamond production documented in the USGS 2026 summary.
Historic spinel-producing region extending across modern borders.
National Diamond production documented in the USGS 2026 summary; individual mines require separate current evidence.
Multiple Brazilian schist-hosted Emerald deposits contribute to laboratory reference collections.
National Diamond production documented in the USGS 2026 summary.
Canadian hydrothermal veins preserve locality-specific Amethyst geology, zoning, and mineral associations.
Muzo, Chivor, Coscuez, and related Colombian districts represent hydrothermal black-shale-hosted Emerald settings.
Coober Pedy is a major South Australian light-Opal field and active production center.
Important Brazilian Alexandrite source represented in laboratory origin research.
India is a documented Alexandrite source in laboratory origin research.
A major schist-hosted Emerald reference population in Zambia.
Historic high-altitude source region associated with notable blue sapphire.
Historic Central Asian source region documented for fine red spinel.
Lightning Ridge in New South Wales is renowned for dark-bodied and black Opal and remains an active production center.
Gem district known for spinel and corundum, including cobalt-bearing blue and purple spinel.
Luc Yen produces chemically and visually diverse Tourmaline in pegmatite and metamorphic settings.
Madagascar is a documented Alexandrite source with overlapping origin features.
Madagascar is a documented source of Aquamarine, including strongly colored material.
Major modern reference population for metamorphic and basalt-related blue sapphire.
Madagascar is an important source of complexly zoned Liddicoatite-related and Elbaite Tourmaline.
Tanzanian gem district documented as an important spinel source.
The Merelani/Mererani/Mirerani mining area in Simanjiro District, Manyara Region, is the commercial source of Tanzanite.
Brazilian pegmatite regions are historically important sources of Aquamarine.
Brazilian pegmatite districts are important sources of Elbaite and many colored Tourmalines.
Mogok is a reference town within the larger Mogok Stone Tract.
Documented United States sapphire localities represented in gemological reference material.
Montepuez District contains the major ruby-producing area described in GIA field reports.
Mozambique is a documented source of copper-bearing blue-to-green Tourmaline used in Paraíba-type origin research.
Marine and alluvial Diamond production forms an important national context.
Nigeria is a documented source of Aquamarine, including saturated smaller material.
Nigeria is a documented source of copper-bearing blue-to-green Tourmaline used in Paraíba-type origin research.
Pegmatite districts of northern Pakistan are documented for Aquamarine crystals and specimens.
An important hydrothermal Emerald region with inclusion overlap requiring careful analysis.
Queensland fields produce Opal seams naturally associated with ironstone matrix, including boulder Opal.
Volcanic geodes in southern Brazil have supplied major quantities of Amethyst crystals and faceting rough.
National Diamond production documented in the USGS 2026 summary; rankings are date-sensitive.
Historic and current national Diamond production documented in USGS reporting.
Alluvial Chrysoberyl deposits are documented sources of Alexandrite.
Long-documented alluvial gem fields with sapphire and spinel occurrences.
Tanzanian Alexandrite is represented in modern origin reference populations.
Historic Ural source that established Alexandrite's name and classic market reference.
Historic Russian Emerald occurrences form part of laboratory origin-reference populations.
Wegel Tena in Wollo Province is a documented volcanic source of play-of-color Opal, much of it hydrophane.
Zambian government statistics document national Amethyst production for 2024.
Cabo Delgado Province is the administrative setting for the Montepuez ruby district.
Mandalay Region is the administrative parent for the Mogok gemstone district.