Garnet: Extraction
From beach sands in Australia to gneiss in New York
What this tab covers How it is mined, drilled or grown, and processed into a tradeable form: the main methods compared, their unit economics, by-products, and the companies that do this work globally and in India.Industrial garnet occurs in gneisses and schists, contact-metamorphic rocks and pegmatites. It also concentrates in heavy-mineral sands. Australia and India mine alluvial and beach sands, while New York mines coarse crystalline gneiss near North Creek. Ore is separated by gravity and magnetic methods, then crushed and screened to size. Producers often stay competitive by mining garnet with other saleable minerals, such as kyanite, marble, mica, sillimanite, staurolite or wollastonite. Used garnet can be cleaned and reused several times.
Industrial garnet comes mostly from heavy-mineral sands, where waves and rivers have already concentrated it with ilmenite, rutile and zircon. Mining these sands is cheap, but separating garnet from radioactive monazite brings tight regulation, which is why India's private beach-sand industry was shut. Hard-rock garnet from gneiss is crushed and separated, and is often viable only with by-products. Recycling of spent blasting and waterjet garnet is a growing third source.
Methods compared
| Method | Share of supply | Typical scale | Recovery / efficiency | By-products | Unit cost |
|---|---|---|---|---|---|
| Coastal heavy-mineral sand mining (Western Australia) | Australia 350,000 t in 2025, about 48% of world output (USGS) | Heavy Minerals' Port Gregory plan: about 143,000 t/yr of garnet for nine years, 24-year life (PFS, July 2026) | n/a | Ilmenite | Port Gregory PFS: capex A$122.1 million, life-of-mine operating costs A$1.53 billion, post-tax NPV A$322.8 million, IRR 47.6% (Kalkine Media, July 2026) |
| Beach-sand mining with mineral separation (India, Tamil Nadu and Kerala) | India 15,000 t in 2025, about 2% of world output (USGS); IBM recorded 9,859 t, all public sector, in 2022-23 | Private companies mined about 900,000 t of garnet between 2000 and 2008, well over legal limits (Wikipedia) | n/a | Ilmenite, rutile, zircon, sillimanite, monazite | Not published; IBM valued 2022-23 output at Rs 36.2 crore, about Rs 3,670/t (indicative, basis: value divided by tonnage) |
| Hard-rock and alluvial mining (US, China) | China 280,000 t (38%) and US 77,000 t (11%) in 2025 (USGS) | Three US mining companies in 2025 (USGS) | n/a | Kyanite, marble, mica, sillimanite, staurolite, wollastonite (USGS) | Not published; US crude concentrate about $220/t in 2025 against an import unit value of $170/t (USGS) |
| Recycling of spent garnet | n/a | US plants: Oregon 16,000 t/yr and Pennsylvania 25,000 t/yr capacity (USGS 2025) | n/a | n/a | Not published |
How each method works
Coastal heavy-mineral sand mining (Western Australia)Garnet-rich dune and beach sands are dry-mined, concentrated on spirals, then dried and separated magnetically and electrostatically, with ilmenite as a by-product. The coarse, clean almandine suits blasting and waterjet.
Low-cost, high-quality supply; concentrated in a few operations.
USGS MCS 2026; Heavy Minerals Ltd PFS via Kalkine Media (July 2026) Beach-sand mining with mineral separation (India, Tamil Nadu and Kerala)Beach placers are scooped or dredged and separated into garnet, ilmenite, rutile, zircon, sillimanite and monazite. Since 2019 only government agencies may hold atomic mineral rights, so IREL is the only legal beach-sand miner in Tamil Nadu.
Large resource; monazite and coastal-zone rules make it a policy-driven, often contested activity.
USGS MCS 2026; IBM Indian Minerals Yearbook 2023; Wikipedia, Sand mining in Tamil Nadu Hard-rock and alluvial mining (US, China)Garnet gneiss in New York and alluvial deposits in Montana are mined and processed by crushing, screening and magnetic separation; China mines both types. Profitability often depends on high-grade ore or co-products such as kyanite, mica or wollastonite (USGS).
Local supply for US users; struggles to compete with imports.
USGS MCS 2026 Recycling of spent garnetUsed blasting and waterjet garnet is collected, washed, dried and re-screened to remove fines and paint, then resold. Garnet can be recycled multiple times without significant loss of quality (USGS).
Cuts waste and import needs; contaminated grit may need special handling.
USGS MCS 2026 Unit economics are indicative ranges from the sources named; costs vary widely by deposit, region and year.Who does it: global
| Company | Country | Activity | Volume | Year | Source |
|---|---|---|---|---|---|
| GMA Garnet Company claim covering all its sources; two mines and eight processing plants | Australia | garnet mining, processing, distribution and recycling; owned by Jebsen & Jessen | 600,000 t/yr garnet supplied (company states 'more than') | c. 2025 (35th anniversary page, undated) | GMA Garnet 'Celebrating 35 years'; S&P Global Market Intelligence (Oct 2024) for ownership |
| Barton International Volume not published | US | hard-rock garnet mining and processing, New York | not published | 2025 | Company information |
| Heavy Minerals Ltd Planned output, not yet in production | Australia | developer of the Port Gregory garnet project, Western Australia | 143,000 t/yr garnet planned (first nine years) | PFS, July 2026 | Kalkine Media report of the PFS (29 July 2026) |
| Opta Minerals Volume not published | Canada | abrasive processing and garnet recycling | not published | 2025 | Company information |
Who does it: India
| Company | Country | Activity | Volume | Year | Source |
|---|---|---|---|---|---|
| IREL (India) Ltd IBM gives the national total, all from the public sector; IREL's own garnet figure is not published separately | India | public-sector beach-sand mining and mineral separation (garnet, ilmenite, rutile, zircon, monazite) | 9,859 t garnet (all-India output, all public sector) | 2022-23 | IBM Indian Minerals Yearbook 2023, Table 3 |
| Transworld Garnet India (V.V. Mineral group) Private beach-sand mining ended after the 2016-2019 central government rules; no current volume | India | former private beach-sand garnet miner and exporter, Tamil Nadu | not published | 2019 | Wikipedia, Sand mining in Tamil Nadu |
India was a major exporter of beach-sand garnet until private mining was halted (2013 NGT order, 2016 monazite rule, February 2019 atomic-mineral rights rule). Output in 2021-22 was 8,182 t, all private, and in 2022-23 9,859 t, all public (IBM). Exports of abrasive garnet were still worth Rs 190 crore in 2022-23, up 33%, well above the Rs 36 crore value of that year's output (IBM); the yearbook does not explain the gap. India supplied 8% of US garnet imports in 2021-24 (USGS).