Engineered quartz is one of the categories where Vietnam is not an alternative to anywhere — it is a principal. When US antidumping duties pushed Chinese quartz past 300%, production relocated, and a large share of it landed here. The sector also has something rarer in Vietnamese manufacturing: a listed, publicly reporting scale leader, which makes the top of the list verifiable.

How this list was put together

Public evidence only — published capacity, listed-company disclosure, customs shipment records and third-party sector coverage. And this is a market-landscape list, not our supplier list: we do not disclose the factories we contract with, and inclusion here is neither an endorsement nor an indication that we do or do not work with a company.

The five

1. Vicostone Joint Stock Company — the scale leader. Listed on the Ho Chi Minh exchange (VCS) and part of Phenikaa Group, Vicostone runs six compound-stone production lines on Breton technology and two fabrication factories, producing around 3,000,000 m² of quartz slab and 500,000 m² of fabricated product a year. It is reported among the largest engineered-stone suppliers to the global market, with several thousand US-bound shipments in customs records. For a buyer, the listed status is the useful part: audited accounts, public filings, an easy counterparty to verify.

2. Phenikaa Group — the parent, and a producer in its own right. Vicostone's parent operates across advanced materials as well as surfaces, and appears in sector rankings independently. Relevant if you are assessing group financial strength behind a supply commitment.

3. Casla Quartz — the established challenger. Recurs consistently in 2025–2026 sector listings of Vietnamese quartz producers serving export markets.

4. VinaQuartz — export-oriented slab producer. Another name that appears reliably across independent Vietnamese quartz supplier coverage.

5. Eurostone — mid-scale slab and cut-to-size. Completes the group of names that appear repeatedly in third-party listings of the country's quartz producers.

A candid note on ranks 2–5: unlike Vicostone, these companies do not publish audited capacity in a way that allows a strict ordering. Treat positions 2–5 as the recognised field, not a league table.

The question to settle before you specify

This is the category where the most important thing is not who makes it.

Engineered stone runs 90–95% crystalline silica. Cut or polished dry, it produces dust that has driven silicosis in more than one in five surveyed Australian stonemasons — which is why Australia has banned the importation of engineered-stone slabs since 1 January 2025, and why California has moved toward the first US restriction. Vietnam has no equivalent restriction, so the risk does not sit at Vietnam's border: it sits in the fabrication shop that cuts your slabs, often in your own country and your own supply chain.

None of that makes Vietnamese quartz a poor product — it is a strong one. It means a responsible specification at least weighs lower-silica bodies and large-format porcelain before defaulting to quartz. Our full treatment is in The Silica Question; the market figures are in our quartz capacity and export note.

What the list does not tell you

Trade-remedy status is per-shipment. US duties on Chinese quartz continued into 2025, and Indian quartz has drawn its own scrutiny. Vietnamese origin has so far been the non-subject alternative — but "so far" is the operative phrase, and it is a status to verify before committing volume, not a permanent feature. See Vietnam vs India.

Certificates decide acceptance, not brand. NSF/ANSI 51 for food-contact surfaces, Greenguard for low-VOC credits — and, in Australia and New Zealand, whether the material is permitted at all.

Sources & data notes

Vicostone's six Breton production lines, two fabrication factories, ~3,000,000 m² slab and 500,000 m² fabricated annual output, HOSE listing and Phenikaa ownership, its reported position among the largest global engineered-stone suppliers, and the recurrence of Phenikaa, Casla Quartz, VinaQuartz and Eurostone in sector listings are drawn from 2024–2026 company, exchange and industry reporting. Silica content (90–95%), Australian stonemason silicosis prevalence (over 22%), Australia's slab import ban from 1 January 2025 and US duties on Chinese quartz exceeding 300% are from occupational-health, regulator and trade- remedy publications. Capacity and rankings change; positions 2–5 are not a strict order. Occupational-health rules are changing quickly by jurisdiction — confirm the law where your material will be fabricated and installed before specifying. Inclusion is not an endorsement and does not indicate a commercial relationship with Make in Vietnam or VITD.

Specifying surfaces and want the silica question weighed honestly against porcelain and lower-silica options? Send us one BOM and the surface lines come back with alternatives costed, inside 48 hours.