CRITICAL MINERAL COMPANIES · RESEARCH
Platinum group metals companies & projects in California
Catalysts, electronics, fuel cells and specialist chemical processing. Explore 3 documented platinum group metals assets in California, their companies, source classifications and related regional opportunities.
Asset counts by province / state · select a region
Canada’s mapped coordinates come from NRCan’s 2025 inventory. U.S. assets are mapped by state using USGS’s June 2026 release. Asset counts describe directory coverage.
MINERAL EXPOSURE
California at a glance
SUPPLY-CHAIN ACTIVITIES
Where assets fit
One asset can report several minerals. An organization may participate in multiple assets. Activity grouping describes the source record, and does not confirm current production, commercial availability or investment readiness.
THE ASSET INVENTORY
Projects, mines & facilities
| Project / facility | Minerals | Region | Source classification |
|---|---|---|---|
| Chino Refinery ↗Almanon Inc. | Platinum group metals | CaliforniaUnited States | RefineryAssumed active · 2026-06-29 |
| Santa Ana Refinery ↗Gemini Industries Inc. | Germanium · Platinum group metals · Rhenium | CaliforniaUnited States | RefineryInactive · 2026-06-29 |
| Santa Fe Springs Plant ↗Heraeus Metal Processing LLC | Platinum group metals | CaliforniaUnited States | RefineryAssumed active · 2026-06-29 |
CORPORATE FOOTPRINT
Companies & operators
Almanon Inc. ↗
Platinum group metals
Gemini Industries Inc. ↗
Germanium · Platinum group metals · Rhenium
Heraeus Group ↗
Platinum group metals
Heraeus Metal Processing LLC ↗
Platinum group metals
CONTINUE YOUR RESEARCH
Mineral sectors in California
Research sources
- U.S. Geological Survey — U.S. facilities, June 2026 ↗Inventory: 2026-06-29 · Checked 2026-09-10
Each asset profile includes its source references and dates. Read the coverage, data licences and review methodology ↗.