Defining Purity Since 1962
The Heritage of Idavue Minerals
Idavue Minerals operates from a geothermally influenced deposit in Clark County, Idaho, supplying high-purity calcium carbonate and calcium bentonite for agricultural and environmental applications.
Through controlled sourcing, third-party verification, and dependable U.S. production, we deliver consistent mineral performance our customers can build their operations around.
Our Journey with Thermocal
2026
Market Expansion in Livestock & Environmental Applications
Strengthened partnerships and product refinement support expanded use in livestock nutrition, bedding management, and soil systems
2025
Strategic Acquisition & Operational Reset
New ownership initiates operational restructuring, positioning Idavue Minerals for focused growth in agricultural and environmental markets.
2015
Quality & Testing Expansion
Implementation of structured third-party laboratory verification and production-lot testing to ensure consistent mineral composition.
1998
Infrastructure Modernization
Facility upgrades and expanded processing capacity improve operational efficiency and supply reliability.
1984
Geological Confirmation
Formal mineral studies confirm the scale and consistency of the calcium carbonate deposit, supporting long-term resource viability.
1962
Establishing Operations
Lidy Mine begins operations in Clark County, Idaho, marking the start of a long-standing geothermal mineral resource.
The Stewardship of Minerals
Guided by our values of reliability and sustainability, our leadership team ensures the long-term protection of the Thermocal deposit.
Melanie Prinsloo
President & Principal Operator
Melanie Prinsloo serves as President of Idavue Minerals, co-leading the company’s strategic growth and long-term development. She directs commercial strategy, partnerships, compliance, and organizational alignment, ensuring the business scales with clarity and discipline.
Al Prinsloo
Vice president
Al Prinsloo serves as Vice President and Principal Operator of Idavue Minerals, co-leading the company’s strategic direction alongside President Melanie Prinsloo. He oversees all mining and processing operations, ensuring disciplined execution, product consistency, and reliable supply.
Johan Van Der Schyff
Director of Mining & Geotechnical
Johan van der Schyff directs mine planning, geotechnical evaluation, and long-term extraction strategy. His expertise supports efficient resource development, structured expansion, and disciplined technical oversight of the Thermocal® deposit.
Charne Van Der Schyff
Executive Coordinator
Charnè supports executive leadership across operational, financial, and strategic functions at Idavue Minerals. Working behind the scenes, she coordinates administration, accounts, and long-term planning to ensure alignment between day-to-day operations and company growth initiatives.