Canadian Wollastonite

What Canadian Wollastonite does

Canadian Wollastonite (legal entity 2005948 Ontario Limited) is a private Canadian mining company founded in 2001 and headquartered at the mine site in Seeleys Bay, Ontario. It operates the Saint Lawrence Wollastonite Deposit (SLWD), the only wollastonite mine in Canada and only commercial diopside source in North America, holding 17.4 Mt of original wollastonite reserves expanded by 20M+ tonnes through a 2019 City of Kingston-approved rezoning, with the deposit designated Provincially Significant by Ontario. The core product is wollastonite (CaSiO3), a calcium silicate mineral with an acicular needle-like crystal structure, sold across four primary lines: agriculture (soil amendment, livestock, CW Grow retail brand, CW Ponds+ water treatment, CW Grit & Grab traction), industrial applications (cement and steel slag conditioning), construction (MTO-certified Superpave performance aggregates, railroad ballast, rip-rap), and environmental remediation (heavy metal and phosphorus adsorption). The mineral offers carbon-neutral calcium, plant-available silicon, and magnesium in a single source and is OMRI-certified for organic farming in both Canada and USA.

The company operates a hybrid go-to-market model combining direct industrial sales through a website contact form, four regional Ontario agricultural distributors, retail via CW Grow at landscape depots using a bulk truckload self-fill format, and a strategic partnership with UK-based UNDO Carbon that monetizes enhanced rock weathering through carbon credit sales to fund free wollastonite distribution to farmers within a 250 km radius of Seeleys Bay. The company has invested more than $1M in university R&D, runs 25+ active research sites with UNDO since 2023, and removed 1,209 verified tonnes of CO2 in 2024 — exceeding the XPRIZE Carbon Removal competition threshold and contributing to a $5M XPRIZE award won in April 2025 alongside UNDO. The stated long-term carbon removal goal is one million tonnes, with the deposit assessed to have potential to sequester over 3 million tonnes when fully developed.

Ownership is concentrated in founders Bob and Jeanine Vasily, who reside on the property, with no venture capital, private equity, or parent-company backing recorded. The company employs 11-50 people across the single mine site near Kingston, with operations including blasting, crushing, and sorting, less than 15% of the 220-hectare landholding disturbed by mining activities, and a stated anticipated $500M local economic impact over the life of the mine. Revenue is not publicly disclosed; product sales span bulk mineral, bagged retail, performance aggregates, and a transaction-fee carbon credit stream via UNDO.

Name

Canadian Wollastonite

Legal name

Canadian Wollastonite

Website

https://canadianwollastonite.com

Company type

Private

Founded year

2001

Operating status

Operating

Headcount range

11–50 employees

Short description

Canadian Wollastonite operates Canada's only wollastonite mine near Kingston, Ontario, producing calcium silicate mineral products for agriculture, industrial fillers, cement, and carbon removal via a partnership with UNDO Carbon.

Ownership category

akta.pro rank

Product category

Industrial Minerals Mining

NAICS

Other Nonmetallic Mineral Mining and Quarrying (21239)

SIC

Mining & Quarrying Of Nonmetallic Minerals (No Fuels) (1400)

akta.pro primary industry

Wollastonite Mining (IMAKAGAO)

akta.pro secondary industries

Wollastonite (IMAEAFAG), Mineral & Rock Dust Amendments (Basalt, Rock Phosphate, Greensand) (AFABADAJ), Mineralization & Carbon-Cured Materials (In-situ/Ex-situ) (EUABAFAD)

Keywords

• Wollastonite mining
• Calcium silicate minerals
• Industrial aggregates
• Soil amendment products
• Enhanced rock weathering

Headquarters

HQ city

Seeley Bay

HQ country

Canada

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Operations, Supply Chain, Personnel, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Wollastonite Product Sales: Sale of wollastonite mineral products in various forms including agricultural soil amendment, performance aggregates for construction, industrial applications (steel slag conditioning, cement production), and consumer products (CW Grow retail, CW Ponds+, CW Grit & Grab). Products sold in bulk, bagged, and retail formats.
2. Performance Aggregates: Sale of ortho-gneiss for major highway surface construction, railroad ballast (Class 1 and 2), concrete and asphalt stone, rip-rap, gabion stone, and landscape/dimension stone products. Certified by Ministry of Transportation for Ontario (MTO) for Superpave and SMA friction aggregate.
3. Carbon Credit Revenue (via UNDO Partnership): Revenue generated through partnership with UNDO Carbon for Enhanced Rock Weathering carbon capture program. UNDO sells verified carbon credits to fund the free provision of wollastonite to participating farmers, covering material and spreading costs while farmers pay only trucking.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels6 records

Core offering

Canadian Wollastonite mines and processes wollastonite (calcium silicate, CaSiO3) from the Saint Lawrence Wollastonite Deposit near Kingston, Ontario, selling crushed and graded wollastonite products for agricultural soil amendment, industrial filler and cement applications, construction aggregates, environmental remediation, and specialty consumer products. The company operates an integrated mining and distribution business with sub-brands CW Grow (retail), CW Ponds+ (water treatment), and CW Grit & Grab (traction), and partners with UNDO Carbon to deliver enhanced rock weathering carbon removal.

Product overview

Canadian Wollastonite operates as a mining company producing wollastonite mineral products and performance aggregates from the Saint Lawrence Wollastonite Deposit near Kingston, Ontario. The product portfolio centers on wollastonite (CaSiO3), a calcium silicate mineral with applications in agriculture (CW Grow for soil amendment, CW Ponds+ for water treatment), industrial uses (cement production, steel slag conditioning), and construction (performance aggregates for roads and railroads). Secondary products include CW Grit & Grab for traction, livestock applications, and dimension stone. The company sells directly to farmers, construction companies, and through retail distributors in Ontario. The UNDO Carbon partnership enables subsidized distribution to farmers for carbon capture via enhanced rock weathering.

Differentiator

Problem solved

Functional benefit

Brands

• CW Grow: Retail brand offering wollastonite products for sale at retail stores and landscape depots in Eastern and Central Ontario.
• CW Ponds+
• CW Grit & Grab

Products and services

• Wollastonite (Bulk Mineral) Primary mined calcium silicate mineral (CaSiO3) sold in various forms for agricultural, industrial, and environmental applications.
• CW Grow Retail brand offering wollastonite products in 10kg bags and bulk format for gardens, lawns, farms, and landscape applications in Eastern and Central Ontario.
• CW Ponds+ Natural wollastonite product for pond and water treatment that prevents and eliminates algae blooms by removing excess nutrients, available in 1mt totes and retail bags.
• CW Grit & Grab Traction improvement product for walkways and road surfaces that provides instant grip at warm and cold temperatures, pet-friendly alternative to salt.
• Performance Aggregates High-performance ortho-gneiss aggregates for construction applications including Superpave hotmix asphalt, railroad ballast, concrete/asphalt stone, and rip rap/gabion.
• Soil Amendment Products Agricultural wollastonite products providing carbon-neutral calcium, plant-available silicon, and essential nutrients for soil health, pest control, and crop yield improvement.
• Industrial Cement Products Wollastonite for cement production as a low-CO2 alternative, providing 30% substitution resulting in combined calcination and energy related CO2 reduction of 24%.
• Synthetic Slag Conditioning Products Wollastonite and diopside products for steel industry smelting, acting as flux for welding, slag conditioner, and oxidation barrier during continuous casting.
• Livestock Application Products Wollastonite products for cattle, poultry, swine, and sheep providing pest control, traction, pH balancing, and nutrient management in barn and bedding environments.
• Environmental Remediation Products Wollastonite products for phosphorus adsorption, heavy metal remediation, acid rain restoration, and carbon sequestration through enhanced rock weathering.
• Countertop & Dimension Stone Dimension stone products from white crystalline wollastonite with greater strength and durability than marble or granite, available as rough cut slabs or specially selected boulders.

Quantifiable outcome

• 80% hay yield increase (60.5 vs 35 bales per acre) with 4 mt/acre wollastonite application
• +9 more outcomes

Named customers7 records

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• UNDO CarboncoreStrategic or Co-development Partner · 1 October 2023Partnership with UK-based UNDO Carbon to deliver enhanced rock weathering (ERW) carbon removal solution to Ontario farmers. UNDO provides carbon credit buyers, measurement/verification expertise, and program management while Canadian Wollastonite supplies crushed wollastonite. Program provides free wollastonite to farms within 250km of Seeley's Bay. Partnership won $5M XPRIZE Carbon Removal Award in April 2025. Initial goal to remove 1 million tonnes of CO2. UNDO has spread more than 150,000 tonnes of silicate rock globally and became Microsoft's first enhanced rock weathering supplier in April 2023.

Scale indicators9 records

Recent moves7 records

Expansion highlights5 records

Broad incumbents

• Lhoist: Belgian privately-held Lhoist is the world's largest lime producer, and lime is the principal substitute product for wollastonite in agricultural pH management and steel slag conditioning. Comparable industrial customer base with broader calcium-based product portfolio.
• Imerys: French multinational leader in mineral-based specialty solutions, now operating NYCO's wollastonite assets. Imerys competes directly in wollastonite fillers and offers broader industrial minerals across ceramics, paper, and coatings — comparable customer base with broader portfolio.
• Minerals Technologies Inc. Minerals Technologies Inc. is a US-listed specialty minerals company producing bentonite, perlite, and other industrial minerals used as functional fillers and additives. Comparable customer base in industrial and consumer applications with broader mineral portfolio.
• Specialty Minerals Inc. Specialty Minerals Inc. (Minerals Technologies subsidiary) produces precipitated calcium carbonate and ground calcium carbonate used as functional fillers in paper, plastics, and sealants. Represents the broader calcium-based filler competitive landscape relevant to wollastonite's industrial uses.

Emerging players

• InPlanet: Germany/Brazil-based InPlanet is an emerging ERW carbon removal company deploying silicate rock dust on tropical agriculture. Targets the same voluntary carbon market buyers (Microsoft, Frontier) and represents a competing buyer-channel for silicate minerals.
• Eion Carbon: Eion Carbon operates an enhanced rock weathering carbon removal platform, partnering with US farmers to spread olivine and other silicate minerals. Competes directly with the Canadian Wollastonite/UNDO model for corporate carbon credit buyers in the voluntary CDR market.

Direct peers

• NYCO (a brand of Imerys): NYCO operated the wollastonite mine in Willsboro, NY for decades and was acquired by Imerys in 2020, making it the most direct North American counterpart. Both companies mine and sell wollastonite for similar industrial, agricultural, and filler applications.
• Wolkem India: India-based Wolkem is one of the world's largest wollastonite producers with multi-decade reserves. It serves the same global industrial filler, paint, ceramic, and plastic customer base and represents the principal international competitor for industrial-grade wollastonite volumes.

Others

• UNDO Carbon: UK-based UNDO Carbon is Canadian Wollastonite's strategic partner for enhanced rock weathering carbon removal and operates similar silicate-based CDR programs globally. While a customer/partner rather than a direct competitor, UNDO is the most material counterparty for the company's carbon credit revenue stream.

Regional players

• Mississippi Lime: US-based Mississippi Lime is a major producer of high-calcium lime and calcium-based products serving steel, construction, water treatment, and agriculture. Competes with Canadian Wollastonite in agricultural liming and water treatment markets, primarily in North America.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/canadian-wollastonite
• Xx.com/CWollastonite
• Facebookfacebook.com/CanadianWollastonite

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Canadian Wollastonite