/ Swiss Holding · Direct Quarry

Stone extracted, fabricated, and delivered — by one company.

SPI Trading & Engineering owns quarries in Italy, Portugal, and Spain. No resellers. Full traceability from extraction to your site.

Close-up environmental shot of a quarry block extraction site in Portugal, freshly cut white limestone block suspended by steel cables against a sheer quarry wall, overcast daylight, scale conveyed by visible machinery arm and rock face texture
Close-up environmental shot of a quarry block extraction site in Portugal, freshly cut white limestone block suspended by steel cables against a sheer quarry wall, overcast daylight, scale conveyed by visible machinery arm and rock face texture
— Quarry Ownership

We know the geology before the block leaves the ground.

SPI owns and operates extraction sites in Italy, Portugal, and Spain. Every material in our catalog traces directly to a quarry we control — no third-party sourcing, no provenance gaps.

Italy · Portugal · Spain

Three countries. Multiple active quarries. One integrated supply chain from extraction through fabrication to international delivery.

Architects and developers gain direct access to material at source — specified to exact vein, calibrated to project volume, delivered under a single contract.

• 37 Varieties · Direct from Source

Rare marble, onyx, travertine, and semi-precious stone.

Every variety in our catalog is extracted and processed within our own facilities. Specify by slab, block, or fabricated element — from single pieces to full architectural cladding.

From single slabs to full architectural installations — direct supply, no intermediaries.