Feldspar: Emissions
Why feldspar's carbon footprint is tiny
Why feldspar's carbon footprint is tiny What this tab covers The greenhouse-gas footprint of the commodity at a global level, split by lifecycle phase: extraction (or farming), refining and processing, movement, usage, and recycling or end of life. Intensities are per unit of product; the global total combines intensity with world output. Also covers other environmental impacts and the main levers to cut emissions. Emission intensity 0.03 t CO2e per t range 0.01-0.08 · cradle-to-gate; derived from diesel for quarrying plus about 30-80 kWh/t (assumed) for crushing, grinding, flotation and drying Global emissions per year 1.00 Mt CO2e per year 2025 · about 0.03 t CO2e/t x 31 MtPer 1 t of ground feldspar at plant gate (cradle-to-gate). Intensity: Indicative, derived; no public sector average found. Global total: Derived from USGS MCS 2026.
Share of footprint by lifecycle phase
Extraction 25% Refining / processing 60% Movement 15%Footprint by lifecycle phase
| Phase | Intensity | Share | Main sources of emissions | Notes | Source |
|---|---|---|---|---|---|
| Extraction | about 0.005-0.01 t CO2e/t (indicative) | 25% | drilling, blasting and diesel loaders in open pits; hand sorting in India | Pegmatite and granite need blasting; feldspathic sands do not | Indicative |
| Refining / processing | about 0.01-0.05 t CO2e/t (indicative) | 60% | crushing, ball milling, flotation, magnetic separation, drying | Low-iron flotation grades use more energy than crude ground feldspar; grid intensity matters (high in India and Turkey) | Indicative; derived |
| Movement | about 0.005 t CO2e/t for a 2,000 km Aegean-Mediterranean voyage (indicative) | 15% | bulk shipping Turkey to Spain and Italy; trucks Rajasthan to Morbi | Bulk carriers at about 3-10 g CO2 per t-km | IMO Fourth GHG Study 2020 (indicative); derived |
| Usage | not applicable directly; enabling | – | feldspar is melted into glass and fired into tiles | Its fluxing lowers firing temperature, but the kiln and furnace fuel use (natural gas) is far larger than feldspar's own footprint | USGS MCS 2026 |
| Recycling / end of life | not published | – | glass cullet reduces feldspar demand; ceramic waste can be milled back into bodies | EU end-of-life recycling input rate 1% | EU CRM 2023; USGS MCS 2026 |
Other environmental impacts
Quarry land disturbance and dust; crystalline silica exposure in milling; flotation reagent residues.
Levers to cut emissions
- Renewable or low-carbon power for grinding mills
- Shorter supply chains: Indian and Turkish clusters already sit near tile plants
- Higher cullet use in glass and recycled ceramic waste in tile bodies
- Use of feldspar and nepheline syenite to cut firing temperature and kiln fuel
India
India is the largest producer by USGS estimate (6.0 Mt in 2025); its footprint is dominated by the Morbi tile kilns that consume it, which switched from coal gasifiers to natural gas after a 2019 National Green Tribunal order (indicative).
Emission figures are indicative global averages from the life-cycle studies named; actual footprints vary widely by site, energy mix and method.