The Marble Price Index tracks 31 natural-stone varieties — marble, quartzite, granite, travertine and onyx — and18 product categories, including engineered quartz, sintered stone and terrazzo priced next to natural stone. This page states, in plain terms, what each number is, where it comes from and how often it changes — so a quoted figure can be checked rather than trusted.
Slab prices are quoted in USD per square foot for polished 2 cm (3/4") slabs (granite is commonly stocked at 3 cm; where a range is 3 cm-based the stone page says so), ex-warehouse in Western markets (US/EU), material only: no fabrication, freight, duty or installation. Every stone carries a range rather than a single number because grade, vein pattern, block quality and the position in the supply chain move the price far more than the stone's name does.
Each stone page carries a price matrix derived from the slab range by a stated model, so every number can be reproduced: $/m² is the slab price × 10.764. FOB slab is 35–55% of the Western warehouse price — inside the index's 30–60% factory-direct band; the warehouse price already carries the importer's freight, duty and margin — at the origin or processing port named on the page. CIF slab adds $4–8 per square foot for ocean freight and insurance to a US/EU port (about 2,500 sqft of 2 cm slab per 20ft container; small orders are priced LCL by volume in the calculator), excluding duty and inland delivery.Quarry block $/tonne is estimated from slab yield — roughly 12–14 m² of 2 cm slab per tonne — at 4–5.5× the slab $/m² for marble and onyx and 4–5× for quartzite and granite; travertine is priced as tile and paver stone. All matrix values are market estimates until replaced by verified quotes; the model itself is published in theopen dataset under pricingModel.
The index keeps a time series per stone — slab low/high, FOB and block — in stone-prices.json, summarised on thehistory page. A point is appended whenever the data changes and at least weekly as a control; past points are never rewritten, so a verified revision shows up as a visible step, not a silent edit.
Product pages carry factory-direct ranges (ex-works China, USD) for finished stone goods — countertops, tables, tiles, sinks, engineered surfaces and so on — plus the minimum order the mill will normally accept. Where a Western installed or retail price is quoted next to it, that is labelled as such; the two are never mixed into one range.
Ranges are compiled from published supplier and fabricator pricing in the US and EU and cross-checked against trade statistics. Until a range has been verified against a specific factory invoice it is markedmarket estimate — on the page, in the open dataset (pricingBasis: market_estimate) and in the structured data. Verified factory pricing from our partner mill in China is being added stone by stone; when a line becomes verified, the label changes and the date moves. That rule is inherited from our sister index,Coloprice.
The current data revision is (August 2026). Price ranges are reviewed on a quarterly horizon, so structured-data offers carry priceValidUntil = revision date + 90 days (2026-11-12). Sitemaplastmod values are the last commit that changed a page's data or text — never the build time.
The index is published underCC BY 4.0:JSON andCSV carry the aggregates. Quote the number, name "Marble Price Index" and link the page it came from — the citable unit is the page, not the site.
The Dream View Co., Ltd., registration no. 0835564009099, Phuket, Thailand. Compiled by Artem Bukhkalov(Founder & CEO). See About.