Photo source: Earthworks Stone
Official source image published with site-owner authorization; source-owner reuse permission remains pending. Original downloaded asset retained unchanged.
Polished Cobalt Black Granite sample.
Compare the producer’s sample photographs and confirm the current range and finish.
Material sources
Black granite from the Cobalt Black Granite Quarry in Fredericktown, Missouri, quarried and supplied by Earthworks Stone.
- Listed supplier
- Earthworks Stone
- Quarry / operation
- Cobalt Black Granite Quarry
- Location
- Fredericktown, Missouri
- Color families
- Black
- Supply route
- Cut stone in polished, thermal, honed and bush-hammered finishes.
- Listing source
- Producer documentation · source checked 29 Sept 2026
- Photograph
- Sourced photograph · checked 2026-09-29
No verified MSHA association recorded.
Research details
No individual MSHA permit is assigned to this material.
Independent source checks
- U.S. material origin
- VERIFIED
- Supplier relationship
- VERIFIED
- Material identity
- VERIFIED
- Producer relationship
- VERIFIED
- Quarry relationship
- VERIFIED
- Quarry location
- UNKNOWN
- Operating record
- UNKNOWN
- Photo source
- VERIFIED
- Photo permission
- PENDING
- Technical data
- UNKNOWN
Each check stands on its own. A photo or coordinate review does not change a confirmed material identity or producer relationship. Operating records do not guarantee current inventory.
Related producer groups
Earthworks StoneSource-described uses
Cladding & exterior walls · Interior walls & fireplaces · Flooring · Landscape & site stone
Uses described by the producer. This is not a finding of suitability for a particular assembly or project.
Application sourceQuarry origin
Cobalt Black Granite Quarry
The material’s relationship to this quarry operation is confirmed. Its individual quarry sites are still being checked.
Ask the supplier about current availability, material range, fabrication and test data for your application. A listing or MSHA status does not establish supply readiness.
Earthworks names its Cobalt Black Granite Quarry in Fredericktown, Missouri. Its cut-stone collection offers this material in polished, thermal, honed and bush-hammered finishes.