Treat the deposit description as a starting point
Serra Verde describes Pela Ema as an ionic-clay operation and its January 2024 output as mixed concentrate. That example does not establish that every project described as clay-hosted has the same process, product or development readiness.
Ask what evidence supports the specific deposit classification and the fraction of material amenable to the proposed extraction method. Total rare-earth content is not a substitute for representative recovery testing. A project description should identify the tested material rather than relying on a broad geological comparison.
Serra Verde: Commercial production announcement, January 2024 ↗
Look at the whole test boundary
For a leach result, retain feed preparation, conditions, duration and the product recovered after subsequent steps. A reported extraction percentage at one stage does not show overall recovery to a saleable product. Nor does it establish reagent consumption, water management or operating consistency at commercial scale.
Then trace the mixed product's destination. Even a promising extraction route still needs separation and any later conversion relevant to magnet supply. Research environmental and operating obligations directly; a general claim about simpler processing should not become a conclusion that no material obligations remain.
An illustrative headline test
Suppose a project reports strong recovery from a selected sample. Ask whether the result represents the planned feed over the operating period and whether downstream product results were included. The finding can be encouraging while still leaving a scale and variability question. Record that distinction instead of converting one laboratory result into an annual supply estimate.
Questions behind an ionic-clay claim
| Claim | Evidence to inspect |
|---|---|
| Recoverable rare earths | Representative samples and extraction conditions |
| Simple processing | Full route, reagents and water requirements |
| Magnet supply | Separated products and downstream destination |
Your review checklist
- Verify the project-specific classification.
- Separate stage extraction from overall recovery.
- Check sample representativeness.
- Trace the product beyond the mixed intermediate.
Investigate with Oreline
Oreline lets your team investigate clay-related project records alongside company and processing evidence. Use that context to compare the industrial case rather than treating a deposit label as a shortcut to supplier readiness.
Follow the evidence through the supply chain.
Explore Oreline’s guided investigations. No account required.
Explore the sandbox →Frequently asked questions
Is every clay-hosted deposit an ionic-adsorption resource?
No. The actual mineral hosting and extraction evidence must support the classification.
Does a high extraction percentage establish profitability?
No. It is one technical measure; the full route, costs, scale and saleable product still matter.