Wollastonite: Overview
The surprising list of everyday things this mineral strengthens
What this tab covers What the commodity is used for, why, in what volumes and with what alternatives, and its chain from mine or field to end user. Also the latest price moves, top recent news, three things to know, and buttons into each tab.Key uses
| Use | Share | Annual volume | Why this commodity | Alternatives |
|---|---|---|---|---|
| Ceramics (floor and wall tiles, frits, sanitaryware) | n/a | n/a basis | Wollastonite is a natural calcium silicate, so it supplies lime and silica without releasing gas on firing. That cuts shrinkage, cracking and glaze defects, raises strength and allows fast firing cycles, which suits high-volume tile plants. USGS MCS 2026, Wollastonite; IBM Indian Minerals Yearbook 2022, Wollastonite | Carbonates (limestone, dolomite) Feldspar Lime Silica |
| Plastics and rubber (filler and reinforcement) | n/a | n/a basis | Its needle-shaped (acicular) particles reinforce thermoplastics, thermosets and elastomers, raising tensile and flexural strength and heat stability while replacing some resin. Surface-treated grades bond better to the polymer. USGS MCS 2026, Wollastonite | Glass fibre Talc, kaolin and mica Calcium carbonate and barite |
| Paints and coatings | n/a | n/a basis | As an extender it toughens the paint film, buffers pH, improves weathering, reduces gloss and lets makers use less costly pigment. USGS MCS 2026, Wollastonite | Calcium carbonate Talc Kaolin |
| Friction products (brake linings) and asbestos replacement | n/a | n/a basis | It is fibrous like asbestos but not a health hazard, stable at high temperature and resistant to chemicals. The 2024 US ban on chrysotile in brakes and gaskets could lift demand. USGS MCS 2026, Wollastonite and Asbestos | Aramid and other organic fibres Steel and ceramic fibres Glass fibre |
| Metallurgy (welding flux, slag conditioner, continuous-casting powders) | n/a | n/a basis | It provides calcium oxide and silica in a clean, low-loss form, conditions slag and protects the molten steel surface in continuous casting. USGS MCS 2026, Wollastonite | Lime plus silica Synthetic mould powders |
| Construction products (cement board, adhesives, sealants, stucco) | n/a | n/a basis | Acicular particles add crack resistance and dimensional stability to boards, caulks and adhesives, and replaced asbestos in asbestos-cement type boards. USGS MCS 2026; IBM Indian Minerals Yearbook 2022 | Cellulose and polymer fibres Calcium carbonate and talc fillers |
From mine to user
- Deposit Wollastonite forms where siliceous limestone is metamorphosed or altered by silica-rich fluids near intrusions (USGS).
- Open-pit mining India's output of 108,383 t in 2021-22 came from three private mines in Rajasthan, almost all from Udaipur district (IBM).
- Beneficiation Ore is crushed and cleaned of associated minerals to a high-brightness concentrate.
- Grinding and classification Concentrate is milled to powders or to high aspect ratio (acicular) grades; finer and more acicular grades sell for more (USGS).
- Surface treatment Some grades are coated to bond with polymers, which raises the selling price (USGS).
- Sale and export Bagged product goes to tile, plastics, paint and brake makers; India exported 11,705 t in 2021-22, 57% to Belgium (IBM).
Price movement snapshot 2026-10-25
No public daily or monthly benchmark price for this commodity in the datasets used.
Three things to know
- China mined about 600,000 t of wollastonite in 2025, roughly 70% of the reported world total.
- About 68 people worked at US wollastonite mines and mills in 2025, all in New York.
- The 2024 US ban on chrysotile asbestos could push more wollastonite into brake and friction products.
Top recent news snapshot 2026-10-25, last 30 days
No recent articles from the listed publishers were found in the snapshot.