A public record of the stone in your built environmentExplore the mapBrowse all locationsFor researchersAbout the project
London Pavement Geology — home
Submit a location

Now extended for the rest of the UK

  • Explore
    • Map of all sites
    • Search Locations
  • Browse
  • Submit a Location
  • About
    • About this project
    • Project History
    • Further Reading
    • Useful Links
    • Mobile App
  • Contact

Categories

AllIgneousMetamorphicSedimentaryFossilStructure
 
 
 

Home/Explore the map/Browse A–Z: 0–9

39, St James's Street & Piccadilly

Welsh Jasper

  • Metamorphic
  • Dolomite marble
  • Neoproterozoic

This stone is older than it looks. Send it to someone five minutes away.

  • WhatsApp (opens in a new tab)
  • Bluesky (opens in a new tab)
  • X (opens in a new tab)
  • Facebook (opens in a new tab)
  • Email

See the message

Just found Welsh Jasper in 39, St James's Street & Piccadilly.

Neoproterozoic dolomite marble, quarried at Mynydd Carreg, Lleyn Peninsula, North Wales, UK. Nearest stop: Green Park.

This stone is older than it looks — worth five minutes if you're nearby.
https://www.londonpavementgeology.co.uk/location/97-39-st-james-s-street-piccadilly/

Location Details

Back to Map

Location of Geological Feature
Cladding on the first storey.
Rock Type
Dolomite marble
Geological Age
Neoproterozoic
Quarry Location
Mynydd Carreg, Lleyn Peninsula, North Wales, UK
Category
Metamorphic
Nearest station
Green Park
Address
39, St James's Street SW1A 1JD
Building architect
Runtz & Ford
Date of build
1908
39, St James's Street & Piccadilly — Welsh Jasper
Welsh Jasper at 39, St James's Street & Piccadilly
Welsh Jasper at 39, St James's Street & Piccadilly (detail 2)
    Entry submitted by Ruth

More stone at 39, St James's Street & Piccadilly

  • Pentelic Marble
  • Rojo Bilbao

Nearby

The closest other recorded buildings.

  • Beretta GalleryKemnay Granite40 m · about 1 min walk
  • Standbrook HousePortland Stone: Whitbed50 m · about 1 min walk
  • Mappin & WebbDark Shap Granite50 m · about 1 min walk
  • 45, Old Bond StreetBath Stone60 m · about 1 min walk
  • The WolseleyPortland Stone: Whitbed60 m · about 1 min walk
  • Burlington ArcadeMoorcroft Marble80 m · about 1 min walk

Suggest an Edit


London Pavement Geology

A public record of the stone in your built environment.

Like the site? Buy us a coffee

Explore

Map of all sitesSearch locationsBrowse every location

Contribute

Submit a locationContact us

About

About this projectProject historyFurther readingUseful links

Funding, sponsorship and supporting institutions

  • Marelambis Ltd.
  • University College London
  • Petroleum Exploration Society of Great Britain
  • Geologists' Association Curry Fund
  • Geoscience Wales
  • The Geological Society
  • London Geodiversity Partnership

With donations from individuals in the oil and gas industry who wish to remain anonymous.

Building stone data by Ruth Siddall, Dave Wallis and contributors. Project founded by Dave Wallis.

Privacy policyCookie policyTerms© 2026 London Pavement GeologyWeb design by Livetech

We would like to use Google Analytics to see which pages people find useful. It sets cookies in your browser, so we only do it if you say yes. Nothing about you is identified individually. What we use and why.