Eloro’s Billion-Tonne Silver Find and the Gap in Its Valuation

A single updated mineral resource estimate (MRE), filed on 22 April 2026, gave Eloro Resources’ Iska Iska project in Bolivia a combined resource exceeding one billion tonnes of ore. The headline figures include approximately 358 million ounces of silver alongside 5.75 million tonnes of zinc, 2.1 million tonnes of lead, and significant tin and gold credits. Crescat Capital, which owns approximately 16.2% of Eloro on a partially diluted basis, estimates the aggregate silver-equivalent total at roughly 1.25 billion ounces when all metal credits are included, and calls Iska Iska one of the most undervalued polymetallic positions in its portfolio.

Silver discoveries of this scale are rare. The April 2026 NI 43-101 (National Instrument 43-101) update pushed total inferred tonnage to 945.43 million tonnes while simultaneously introducing a new 85.17-million-tonne indicated resource category, a combination that places Iska Iska among the larger undeveloped silver-equivalent polymetallic deposits reported globally in recent years.

The World Silver Survey 2025 documents global mined silver supply running well below 900 million ounces annually, a figure that contextualises why a single undeveloped deposit carrying 358 million ounces of silver alongside polymetallic credits occupies a genuinely rare position in the global project pipeline.

What follows unpacks the resource numbers in detail, traces the deposit’s growth trajectory since 2023, explains why the polymetallic economics matter, presents Crescat’s undervaluation thesis on its own terms, and weighs the risk factors and forward catalysts that a commercially minded investor should consider before forming their own view.

What the April 2026 resource update actually shows

Start with the tonnage. Combined indicated and inferred material now exceeds one billion tonnes, a threshold that places the deposit in a weight class few undeveloped polymetallic projects occupy. The indicated category, entirely new in this update, accounts for 85.17 million tonnes at 40 g/t silver, containing 109.53 million ounces. Its emergence signals meaningful progress in geological confidence for at least a portion of the deposit.

The inferred resource adds 945.43 million tonnes at 8.5 g/t silver, holding a further 248.60 million ounces. Together, silver alone totals approximately 358 million ounces.

Silver is only part of the inventory. Zinc contributes 5.75 million tonnes (1.03 Mt indicated, 4.72 Mt inferred). Lead adds 2.1 million tonnes (0.60 Mt indicated, 1.50 Mt inferred). Tin sits at 290,000 tonnes inferred at 0.03% Sn, and gold at 1.21 million ounces inferred at 0.04 g/t Au.

According to Crescat Capital’s analysis, the aggregate silver-equivalent total across all metal credits is approximately 1.25 billion ounces AgEq, a figure derived from Crescat’s own calculations rather than from Eloro’s published MRE disclosure.

From 2023 maiden estimate to 2026 update: how fast the resource has grown

The 2023 maiden MRE established approximately 670 million tonnes of inferred material containing roughly 298 million ounces of silver, 4.09 million tonnes of zinc, and 1.74 million tonnes of lead. Eloro published an aggregate figure of 1.15 billion ounces AgEq for that initial estimate.

Three years later, the numbers have moved in every direction that matters. Inferred tonnage climbed to 945.43 million tonnes, an increase of approximately 41%. Silver grew from 298 Moz to 358 Moz. Zinc expanded from 4.09 Mt to 5.75 Mt. Lead moved from 1.74 Mt to 2.1 Mt. Crescat’s updated AgEq interpretation rose to approximately 1.25 billion ounces.

Critically, the resource expansion came alongside, not instead of, category upgrading. The 85.17 million tonne indicated category did not exist in 2023. The deposit also remains open for further expansion across multiple directions, with step-out drilling still pending at several vectors.

• The resource grew in tonnage, grade contribution, and geological confidence simultaneously
• Multiple directional vectors for expansion remain untested by step-out drilling

Why polymetallic economics matter: silver, zinc, lead, tin, and gold as a combined revenue model

Iska Iska is not a silver deposit that happens to contain other metals. It is a polymetallic system where each metal stream contributes to potential project economics, and the interaction between those streams shapes how the resource should be valued.

Eloro’s technical disclosures define an explicit polymetallic domain (Zn-Pb-Ag) with both open-pittable and underground resource components. Net Smelter Return (NSR)-based cut-offs, which estimate the revenue a mine would receive after smelting and refining costs, have been applied to distinguish between the two extraction methods. This indicates economic selectivity beyond simple grade thresholds.

Each metal brings a distinct economic function:

• Silver (358 Moz): The headline metal and primary driver of the silver-equivalent calculation
• Zinc (5.75 Mt): Classified as a critical metal; used industrially to galvanise steel against corrosion, making it a significant revenue stream
• Lead (2.1 Mt): An industrial metal and meaningful by-product credit that supports overall project economics
• Tin (290,000 t): A critical mineral in electronics supply chains; contributes to the AgEq calculation and adds supply-chain relevance
• Gold (1.21 Moz): A precious metal by-product credit that enhances per-tonne revenue

Critical minerals supply chain alliances between resource-rich nations and technology-dependent economies have accelerated since 2023, creating a geopolitical tailwind for projects containing tin, zinc, and silver, each of which appears on multiple national critical minerals lists and attracts offtake interest from industrial end-users seeking supply security.

Ore-sorting potential was identified in the 2023 maiden MRE as a processing cost-reduction opportunity, and robust NSR values driven by zinc, lead, and silver were emphasised in Eloro’s initial technical disclosures.

Open-pit versus underground resource zones

The application of distinct NSR-based cut-offs to open-pit and underground components means that the project’s economic profile is not uniform across the resource. Open-pit material and underground material carry different cost structures, recovery assumptions, and capital requirements. This distinction matters when assessing which portions of the resource could be economically extracted at various commodity price scenarios.

Production cost pressures across mining projects at the development stage are not uniform: open-pit and underground operations carry fundamentally different cost curves, and the interaction between commodity price levels and all-in sustaining costs determines which resource categories remain economically accessible across different price scenarios.

For a commercially oriented reader, the key takeaway is that Iska Iska’s value is not purely a function of the silver price. Zinc, lead, tin, and gold price movements all influence the project-level economics, creating both additional upside potential and a dimension of execution complexity that a single-metal framing would conceal.

Crescat’s undervaluation thesis: the case for a mispriced discovery

Crescat Capital’s argument is structurally straightforward: Eloro Resources’ market capitalisation does not reflect the scale of the in-situ metal endowment at Iska Iska.

According to Crescat Capital, Eloro’s current market valuation does not yet reflect the scale and polymetallic nature of the Iska Iska resource, which Crescat estimates at roughly 1.25 billion ounces silver equivalent, including 358 million ounces of silver, 5.75 million tonnes of zinc, and 2.1 million tonnes of lead.

The conviction behind this thesis has specific personnel anchors. Bill Pearson, who brings approximately 50 years of field exploration experience and is described as a co-discoverer at Iska Iska, now serves as Crescat’s geological and technical advisor. His appointment followed the transition of Quinton Hennigh, previously Crescat’s geological advisor, to full-time leadership as Chairman and CEO of San Cristobal Mining, which is described as the single largest holding across Crescat’s portfolio. Kevin Smith of Crescat has repeatedly cited the 1.25 billion ounce AgEq figure as central to the firm’s investment case.

Crescat holds approximately 16.2% of Eloro on a partially diluted basis, with Eloro representing approximately 4.8% of total firm assets under management, according to Crescat’s own presentation materials.

The thesis is coherent. Whether it is correct requires independent verification that the available data does not yet provide. To substantiate the undervaluation claim quantitatively, an investor would need:

The mining supply gap thesis underlying Crescat’s position in Eloro rests on a structural argument that new mine supply has failed to keep pace with projected demand across silver, copper, and base metals for more than a decade, a backdrop that shapes how the firm frames early-stage resource scale as a premium rather than a speculative one.

• Current enterprise value for Eloro
• Peer EV-per-ounce-AgEq comparisons for similar-stage polymetallic projects
• Adjustments for Bolivia’s jurisdictional risk premium
• Discounts for the inferred-heavy resource classification
• Capex intensity estimates from a completed economic study

None of these inputs are resolved in the publicly available data. Crescat’s thesis should be understood as a well-articulated investment opinion, not a demonstrated valuation conclusion.

What investors need to weigh: Bolivia, resource classification, and the path from drill hole to mine

The same resource scale that makes Iska Iska a compelling story also defines the distance between the current estimate and a producing mine. Several risk dimensions warrant direct consideration.

Bolivia’s jurisdictional risk

Bolivia presents a higher-risk operating environment relative to Tier 1 mining jurisdictions. The regulatory, political, and fiscal framework introduces uncertainty that should not be treated as a footnote to the resource story. Jurisdictional risk of this nature typically commands a discount in peer valuations.

Resource classification, study stage, and execution complexity

The resource is heavily inferred-weighted: 945.43 million tonnes of inferred material out of approximately 1.03 billion tonnes total, meaning the overwhelming majority of the deposit carries lower geological confidence than indicated or measured classifications.

The CIM Definition Standards for Mineral Resources establish the official distinctions between inferred, indicated, and measured categories that NI 43-101 technical reports must apply, with inferred material carrying the lowest geological confidence and requiring substantially more drilling before it can support economic study conclusions.

• Inferred-heavy classification: Greater geological uncertainty; substantial infill drilling required before economic studies can rely on the full resource
• No completed PEA (Preliminary Economic Assessment) or PFS (Pre-Feasibility Study): The gap between resource scale and demonstrated production feasibility remains wide
• Metallurgical complexity: A polymetallic tin system involves multiple metal streams requiring distinct processing paths; recoveries for each metal require further technical work
• Capex intensity: Large-scale operations combining open-pit and underground components demand substantial capital investment
• Permitting uncertainty: Permitting timelines and status are not resolved in available sources
• Commodity price sensitivity: Project-level value at this scale is sensitive to silver, zinc, and tin price movements simultaneously

These are not disqualifying factors. They are necessary inputs to any honest commercial evaluation of what Iska Iska’s resource numbers actually represent in terms of realisable value.

The drill season ahead and the catalysts that could close the valuation gap

Eloro is mobilising additional drilling equipment for the upcoming season. This is confirmed activity, not speculative.

The drill program carries two distinct types of potential results. Step-out drilling could expand the inferred resource laterally or at depth, building on a deposit already characterised as open in multiple directions. Infill drilling could upgrade inferred material toward the indicated category, extending the progression demonstrated by the 85.17 million tonne indicated tier established in the April 2026 update.

The deposit remains open for expansion across multiple directions, with both step-out and infill drilling components planned for the upcoming season, according to Eloro’s public disclosures.

The catalyst sequence, ordered by approximate timeline:

1. Near-term: New drill results from step-out and infill programs (confirmed, equipment being mobilised)
2. Near-to-medium-term: Potential upgrade of additional inferred material to the indicated category
3. Medium-term: Potential announcement of a PEA or PFS timeline (not yet indicated as imminent)
4. Longer-term: Potential Pre-Feasibility Study completion
5. Conditional: Potential strategic partnership or offtake agreement (not yet indicated in available sources)

Silver, zinc, and tin price movements represent an additional variable. At this resource scale, commodity price shifts can materially alter the project-level economic picture independent of drilling outcomes.

Commodity price forecasting models that project significant upside in precious metals are directly relevant to how undeveloped silver and gold resources should be valued: at Iska Iska’s scale, a sustained move in silver or gold prices can materially alter the project-level economics before a single additional drill hole is completed.

The distinction matters for positioning. If the near-term drill results are the primary thesis, Iska Iska is a catalyst-driven opportunity tied to the current season. If the PEA or strategic partnership is the thesis, it is a longer-duration position requiring patience through a multi-year study and permitting cycle.

Scale is necessary but not sufficient: what Iska Iska’s story ultimately depends on

Iska Iska occupies a rare position among undeveloped silver-equivalent polymetallic deposits globally. The resource numbers are large. Crescat’s undervaluation argument has a coherent structural logic. The growth trajectory from 2023 to 2026 suggests the geological system continues to deliver.

The distance between the April 2026 MRE and a producing mine, however, involves Bolivia’s regulatory environment, an inferred-heavy resource classification, unresolved metallurgy across multiple metal streams, and no completed economic study. Each of these variables reshapes how the headline figures should be read.

The upcoming drill season represents the nearest concrete opportunity to observe the thesis develop. New results will either validate resource continuity and extend the category upgrade progression, or introduce uncertainty into the geological model.

The variables to monitor from here:

• Drill results from the step-out and infill programs, particularly whether infill drilling continues converting inferred material to the indicated category
• Study announcements, specifically any indication of a PEA or PFS timeline from Eloro
• Commodity price movements in silver, zinc, and tin, each of which influences project-level economics at this scale
• Bolivia regulatory developments that could alter the fiscal or permitting framework for mining operations

This article is for informational purposes only and should not be considered financial advice. Investors should conduct their own research and consult with financial professionals before making investment decisions. Forward-looking statements regarding drilling programs, resource expansion, and potential economic studies are speculative and subject to change based on market developments and company performance.