Diamond Stone: articles, facts and history
Date: 2026-11-11. Revision 1. Part of the website plan (docs/WEBSITE.md revision 2);
drawn in docs/website-map.html; screens in the mockup under "Website: learning,
products and arrivals".
What the site publishes beyond its stone pages: answers, guides, articles, a library of facts, the history of Omani stone and of marble, and a glossary. And how every word of it is kept true. This is a plan for the content, with a researched base of what can and cannot be said. It is not the content itself.
Research was done on 11 November 2026. Each point below is marked by how it was checked: read (on the source's own page) or unverified (a summary, or general knowledge). Standards documents (ASTM, EN) are sold, not free, and were not read; no figure from them may be published until the document is bought and checked.
1. Why a stone trader should publish at all
- Search engines now discount what anyone could have written. Google's guidance favours first-hand content and names trust as the most important quality. A trader's own test reports, slab photographs, loading records and inspection method are exactly that.
- AI answers quote sources that give figures, quotations and citations. In the one controlled study (Aggarwal and others), adding a quotation raised a page's visibility by about 41 %, statistics by about 33 %, and citing sources by about 28 %; stuffing keywords lowered it. The study used an older engine, so the direction matters more than the numbers.
- Nobody has written a sourced history of Omani stone. What ranks today is news, supplier catalogues, an unsourced trade wiki and tour pages. A careful one is an open place to be the reference.
- Buyers ask the same thirty questions. Answering them once, properly, saves sales time on every enquiry.
2. Five rules
- No claim without a fact. Every statement of fact in an article is tied to a Fact record with a source and a date. The editor refuses to send an article to review with a loose claim (drawn in the mockup).
- A fact lives in one place. Change it once and every page, datasheet and answer that uses it changes. A fact past its review date raises a Halo ring.
- A named person wrote it and another checked it. Each has a page saying who they are and what they do here.
- A date changes only when the content does.
- Written by people. A language model may draft a summary, suggest a structure or propose an Arabic version; a person writes and approves. Nothing is published in bulk. Google treats mass-produced pages as spam whatever tool made them, and now names attempts to manipulate AI answers as spam too.
3. The library
"Journal" on the site. Six kinds, each a record type in the staff app.
| Kind | What it is | Length | Example | First release |
|---|---|---|---|---|
| Answer | One real question, answered in the first two lines, with figures and their source | Short | "Is Omani marble suitable for bathrooms?" | 20 |
| Guide | How to choose, specify, order or care | Medium, with tables and photographs | "Honed or polished: which finish for a floor?" | 6 |
| Fact | One value or statement with its method, date and paper | A card | "Desert Rose: water absorption, with its test report" | Every tested value of every stone |
| History | Two timelines, each entry with its source | Long | "Stone in Oman"; "Marble through the ages" | 2 pages |
| Word | A trade term explained in two lines | Very short | "Bookmatching"; "Honed"; "Fissure" | 40 |
| Article | A piece with a point of view or a story: a project, a visit, a test, a comparison | Medium | "How we match: the range, one lot, the layout" | 1 a month |
Every piece ends in a next step: the stones it mentions, with samples. Every stone page shows the answers and guides that mention it.
What to write first
From the questions buyers actually ask (gathered from forums and fabricators' sites, unverified and anecdotal; the inbox will give the real list once live):
| Topic | Kind | Note on what can be said |
|---|---|---|
| Marble or limestone: what "marble" means in the trade | Guide | Section 5. The most important piece, and the one others get wrong |
| How to read a test report | Guide | What each test measures; what a good value is, from the bought standard |
| Honed, polished, brushed: finishes | Guide | Guidance from practice; our own slip-test results where we have them |
| Etching and staining; does sealing help | Answer | Acids etch calcite; sealing slows stains and does not stop etching |
| Fissure or crack | Answer | With photographs of both |
| Bookmatching | Answer, Word | With real slabs |
| How we select and match | Article | No universal grading standard was found. So: our own selections, each defined by photographs of its range, and said to be ours. Nothing on what was refused (docs/MATCHING.md) |
| How much fits in a container | Answer, and the calculator | From our own loading records, not an estimate |
| Stone outdoors in the Gulf: heat, salt, slip | Guide | Only measured values per stone; no general figures |
| How buying works: quantities, time, terms | Guide | docs/WEBSITE.md section 13 |
| Samples: what a sample can and cannot show | Answer | Ties to the terms of sale on natural variation |
| Caring for a marble floor | Guide | |
| Natural stone and carbon | Article | Section 6: only with named sources and their scope |
| Is stone radioactive | Answer | Section 6: the careful version |
| Omani stone beside Turkish and Italian | Article | No independent comparison exists. Only our own side-by-side test values, where we have reports for each |
4. History: what can be told
Two pages. Each entry on the timeline shows its source to the reader. Entries marked "unverified" here are not published until someone reads the source.
Stone in Oman
| When | What | Source and strength |
|---|---|---|
| About 95 to 76 million years ago | An enormous sheet of ocean floor (the Samail ophiolite) was pushed over the older limestones of what is now northern Oman. The limestones beneath and around it are the source of today's stone | Wikipedia summary of the geology (read); to be re-sourced from a geological paper |
| The country's rocks used as building stone include limestone, dolomite, marble, granite, gabbro and gneiss | Sultan Qaboos University project page (read; strong) | |
| About 2600 to 2000 BCE | The Umm an-Nar people of Oman and the Emirates built round tombs of carefully fitted cut stone, and carved vessels from soft stone | Wikipedia (read); to re-source from a museum or paper |
| 12th to 15th century | Bahla Fort, a World Heritage site: mud brick, with a lime-and-fired-clay mortar tradition (sarooj) | Wikipedia (read); UNESCO page to be checked by hand |
| 1311 | Carved marble gravestones in Dhofar were made in Gujarat and brought by sea. Historic marble in Oman was imported | Victoria and Albert Museum (read; strong) |
| 1994 to 2001 | The Sultan Qaboos Grand Mosque is built, with imported stone | The contractor's own page (read) |
| 2008 to 2019 | Output of marble grows from about half a million tonnes a year to over a million | Business press citing the ministry and the Central Bank (read). The series disagree with each other; always give year and source |
| 2019 | The Mineral Wealth Law (Royal Decree 19/2019). A resolution bans the export of raw marble blocks, and of slabs thicker than 3 cm | Legal summary; Oman Observer (both read) |
| 2020 | The mining authority is merged into the Ministry of Energy and Minerals | The decree (read) |
| 2025 | The ministry names the marble areas: Ibri, Bahla, Nizwa, Ibra, Al Qabil, Mahadha and the Hajar mountains; more than 15 working quarries and about 11 plants | Ministry, quoted in the Oman Observer (read) |
| 2026 | The mining law is amended (Royal Decree 69/2026) | The decree's listing (read); its text was not obtained |
Marble through the ages
| When | What | Source |
|---|---|---|
| The word comes from the Greek for "shining stone" | Wikipedia (read) | |
| About 3,000 years ago | Marble use in the Mediterranean begins on Naxos; then Paros, the finest for sculpture, and Mount Pentelikon near Athens | British Geological Survey-hosted paper, 2018 (read; strong) |
| 447 to 432 BCE | The Parthenon, in Pentelic marble | Wikipedia (read) |
| 1st century BCE | Rome takes up the quarries at Carrara | The 2018 paper (read) |
| Antiquity | The island of Proconnesus gives the Sea of Marmara its name; its marble is in Hagia Sophia | Wikipedia (read) |
| 706 to 715 | The Umayyad Mosque in Damascus, with marble panelling | Wikipedia (read) |
| From 1362 | The Court of the Lions at the Alhambra; its fountain in Macael marble | Wikipedia (read) |
| 1501 to 1504 | Michelangelo's David, from a Carrara block quarried decades earlier and of ordinary, not statuary, grade | Wikipedia (read) |
| 1632 to 1653 | The Taj Mahal, in Makrana marble | Wikipedia (read) |
| 1876 | A railway is built to bring marble down from the Carrara quarries | The 2018 paper (read) |
| Early 1900s; late 1970s | Wire sawing arrives in the quarries; then diamond wire | Carrara's tourism site (read; medium) |
| Our time | The Sheikh Zayed Grand Mosque: over 165,000 m² of white marble from Macedonia outside | The mosque's own site (read; strong) |
Wikipedia entries are a starting point. Before publishing, each is traced to the source Wikipedia itself cites, or to a museum or university page.
5. The fact the whole library rests on
Much of what is sold as marble, in Oman and everywhere, is not marble to a geologist. In geology, marble is limestone changed by heat and pressure. In the stone trade, "marble" is any limestone-family stone that takes a polish. The ministry itself describes Omani marble as "mainly metamorphic limestone" and dense, polishable stone; a university study is reported to say that commercial Omani marble is dense crystalline limestone, and that some does not meet the American standard for marble (unverified: that paper could not be opened, and it is the most important one to obtain).
What this means for the site:
- Say it plainly, once, in "Marble or limestone", and link every stone page to it. It is honest, it is what an architect needs to know, and no competitor says it.
- Each stone page states what the stone is geologically, where a report says so, and what it is sold as.
- Names: the customer keeps theirs. Inside the company it is known that "Desert Rose" is also sold from Turkey, and that names like Omani Beige and Sahara Beige are used loosely by many sellers. The site does not say this. It shows each stone under the name the visitor used, with the rock, the colour and "Oman" beside it, and its own photographs and test reports. Which of our stones a name means is on staff screens only (
docs/CATALOGUE.md, "Revision 2"). - The public sees "Oman" as the origin, never a quarry (the brand rule stands).
6. What may be said
Safe to state
- That commercial "marble" includes polishable limestones, and much Omani marble is crystalline limestone.
- The marble areas the ministry names; the 2019 law and 2020 merger; the 2019 export resolution, as reported.
- The dated milestones in the marble timeline.
- That acids etch stone made of calcite, and that sealing does not prevent it.
- A stone's own test values, with the method, the date and the report.
Only with a named source, a year and its limits
- Any production, export or quarry figure for Oman.
- The origin of the stone in any landmark.
- Carbon figures. Two sources were read: a Historic Environment Scotland study (about 62 kg of CO₂ per tonne for local sandstone, rising to 134 to 504 for stone imported to the UK, where transport dominates), and the Natural Stone Institute, an industry body (stone flooring about 22 kg per m² against about 82 for terrazzo, at the factory gate). Neither is about Omani stone, and no Omani declaration was found.
- Radioactivity. The US environment agency says data are insufficient to conclude that granite worktops raise indoor radon significantly, and that soil is the main source. It does not mention marble.
- Current export rules, until Royal Decree 69/2026 has been read.
Never
- That Omani marble was used in the Sultan Qaboos Grand Mosque, the Royal Opera House or the Sheikh Zayed Grand Mosque. No source supports any of these; the first is recorded as imported stone.
- That marble was quarried in Oman in ancient times, or that the industry began in a given year. No reliable source gives one.
- "Meets ASTM" or "meets EN" without the report; "CE marked" without the declaration.
- "Radiation-free", "carbon neutral", "greener than porcelain".
- Fixed transit times. Carriers issued disruption notices for the Strait of Hormuz in 2026 (unverified); ranges, with a date, only.
- Any typical value for "marble" in general taken from memory or another website.
7. For the owner's attention: the export rule
The research found, as reported by the Oman Observer in December 2019, a resolution banning the export of raw marble blocks and of slabs thicker than 3 cm, with case-by-case exceptions; a later report of a quota for blocks to India; and an amendment to the mining law in September 2026 whose text was not obtained. One trade source dates the ban differently.
This is outside the website, but it touches what the company may export and therefore what the site, the quotes and the export papers may offer. To confirm with the ministry or a lawyer before the catalogue is published: which thicknesses and forms may be exported today, and to where.
8. Authors, review and upkeep
| Matter | Rule |
|---|---|
| Author | A named member of staff with real experience of the subject; a page with their role, languages and photograph |
| Reviewer | A second person. Technical values: whoever holds the report. History: whoever read the source |
| Outside facts | A link to the source, the date it was read, and a saved copy |
| Photographs | Owned, or licensed in writing. No people without consent (Oman penalises publishing images of people without it; a 2026 law is reported, unverified). Mosque interiors only with permission. Museum images need a licence. No generated or altered stone images |
| Arabic | Written or reviewed by a native reader; never machine translation alone. Search phrases researched in Arabic |
| Review dates | Stone values: at each new test, and at least every two years. Law and trade facts: yearly. History: when a better source is found |
| Corrections | A visible "corrected on" line. Nothing is silently changed |
| Pace | Three or four English pieces and two or three Arabic a month; the first release list in section 3 is about four months' work for one person |
9. To obtain before writing
- The current ASTM standards for marble, limestone and travertine, and the EN test and product standards the datasheets cite. Paid.
- The Sultan Qaboos University geotechnical paper on Omani marble (2015), and the university's dimension-stone project outputs.
- The US Geological Survey's yearly chapter on Oman, and UNESCO's pages for Bahla and the aflaj (free; to be opened by hand).
- The text of Royal Decree 69/2026 and the current export rules.
- A geological source for each stone the company sells: what it is, and its age.
- The company's own test reports, with dates, for every stone and finish.
- Loading records, for container figures.
10. Decisions
- Say plainly that much Omani marble is geologically limestone. Proposed: yes. It is true, useful, and unclaimed.
- Publish how the company selects and matches, with photographs of each selection's range. No photographs of rejects and no refused counts (
docs/MATCHING.mdsection 7). Proposed: yes. - Buy the standards. Needed for the datasheets as much as the articles.
- Who writes. One named person for sales topics, one for quality; marketing edits.
- History pages at launch or after. Proposed: after the first twenty answers, since answers bring enquiries and history brings standing.
11. Sources
Read directly: Sultan Qaboos University's project page; the Oman Observer (December 2019, and December 2025 quoting the ministry); Oxford Business Group 2014; Legal 500 on Royal Decree 19/2019; decree.om for Royal Decrees 96/2020 and 69/2026 (listing only); Global Trade Alert; stonenews.eu; the Victoria and Albert Museum; the Sheikh Zayed Grand Mosque's site; a 2018 paper on Carrara marble hosted by the British Geological Survey; Carrara's tourism site; the US Environmental Protection Agency on radon; Historic Environment Scotland on embodied carbon; the Natural Stone Institute; Wikipedia for dated milestones; Google's guidance on helpful content; the GEO paper. Not obtained: ASTM and EN standards; the 2015 geotechnical paper; USGS and UNESCO pages; the 2026 decree's text. From summaries only (unverified): ASTM and EN values; thermal expansion figures; customs codes; buyers' question patterns; the image law.
Names (added 11 November 2026)
The model for stone names, including which may be shown, is in docs/CATALOGUE.md.
No market name has a public page of its own ("Revision 2" there). The European naming standard (EN 12440) was read in preview: it
requires the name, the kind of rock, the colour and the origin together, and itself
says the same name is used for different stones.
Other companies' claims, and two pieces to write (added 11 November 2026)
Other Omani stone companies name the Royal Opera House Muscat, the Sultan Qaboos Grand
Mosque and buildings in Makkah on their sites, mostly as photograph captions. That is
not evidence for us; the "never" list in section 6 stands until a source that can be
shown has been read. Two pieces are added to "what to write first": a guide to stone
outdoors in the Gulf (heat, salt, slip), and an Arabic answer to what Omani marble
costs, a question no site answers today (docs/COMPETITORS.md).
Blocks and matching (added 11 November 2026)
Diamond Stone sells no blocks, so the export rule on raw blocks appears only as a fact
of history. One point still to confirm: the thickest slab that may be exported (3 cm
is reported). New subjects for the journal: what a range is; what "one lot" means;
laying out before fixing; why a top-up may differ. Words not used: identical, uniform,
guaranteed match. See docs/MATCHING.md.