Material sources
Producer quarry/color map explicitly associates Black Quarry with Monson, Maine; separately lists Pennsylvania Black.
Current producer color list includes Black, but the generic Black image alone cannot distinguish Maine from the separately documented Pennsylvania source.
Sheldon describes quarrying and mill processing. Natural cleft, honed and sandblasted finishes are company-level capabilities.
Sheldon’s Black slate source in Monson, Maine. The producer’s quarry and color guide distinguishes this origin from Pennsylvania Black. Exact extraction-site coordinates and current operating status remain under review.
- Listed supplier
- Sheldon Slate Products
- Quarry / operation
- Black Quarry (producer description)
- Location
- Monson, Maine
- Color families
- Black
- Listing source
- Producer documentation · source checked 24 Sept 2026
- Photograph
- Photograph not yet available.
Independent source checks
- U.S. material origin
- VERIFIED
- Material identity
- VERIFIED
- Producer relationship
- VERIFIED
- Quarry relationship
- VERIFIED
- Quarry location
- REVIEW
- Operating record
- REVIEW
- Photo source
- REVIEW
- Photo permission
- PENDING
- Technical data
- REVIEW
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.
Documented capabilities
- producer processing
- flooring tile; cut-to-size; gauging; natural cleft; honed; sandblasted
Producer processing capabilities; not a claim about extraction-site equipment.
Related producer groups
Sheldon Slate ProductsQuarry origin
- Black Quarry (producer description)MaineOperator: Sheldon Slate Products
Known sources; confirm the quarry and selection for your order.
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.
Names and color tags are sourced from NSI. Photograph sources and reuse terms are recorded separately. Quarry matches can be provisional.