Stone Quality Control

Stone Quality Control & Inspection at Petros® Stone

At Petros® Stone, we take pride in delivering high-quality natural and engineered stones that meet the highest industry standards. Our rigorous quality control (QC) process ensures that every slab, tile, and cut-to-size stone piece maintains exceptional durability, aesthetics, and precision. From raw material selection to the final inspection, we implement stringent quality checks to provide our customers with flawless and long-lasting stone solutions.

Quality Control Steps

Weighing Process — Weighing Test for Full Container Loadability

Petros® Stone QC Glow Test Through Gloss Meter — Glossiness Test

Petros® Stone QC for Colour Consistency Check (1) — Colour Consistency Check

Inspection of Slab for Crack Defects — Inspection of Slab for Crack/Defects

Petros® Stone QC Measurement of Width — Measurement of Width

Petros® Stone QC to Check There is No Bend in Slab — Check With Leveler There is No Bend in Slab

Petros® Stone QC Check Thickness Through Vernier Caliper — Check Thickness Of Slabs

How Our Quality Control & Inspection Works for Each Product

Natural Stones (Granite, Marble, Sandstone, Quartzite, Slate, Limestone)

Block Selection & Cutting: Only premium-grade blocks are chosen, ensuring uniformity in color, pattern, and structural integrity.
Surface Polishing & Finishing: Each slab undergoes precision polishing and resin treatment for enhanced strength and a flawless surface.
Thickness & Dimension Accuracy: We use high-precision measuring tools to maintain uniform thickness and dimensional consistency.
Crack & Imperfection Inspection: Any slab with natural flaws beyond the acceptable tolerance is discarded or reinforced with resin treatment.

Engineered Stones (Quartz, Porcelain, Sintered Stone)

Raw Material Testing: The composition of quartz, resin, and pigments is tested for consistency and performance.
Compression & Curing Checks: Advanced machinery ensures even compaction, preventing internal voids or weaknesses.
Polishing & Edge Profiling: Automated polishers enhance the surface shine, while CNC machines craft seamless edge finishes.
Water Absorption & Stain Resistance Tests: All engineered stones undergo lab testing to validate their non-porous nature and resistance to stains.

Engineered Stones (Quartz, Porcelain, Sintered Stone)

Raw Material Testing: The composition of quartz, resin, and pigments is tested for consistency and performance.
Compression & Curing Checks: Advanced machinery ensures even compaction, preventing internal voids or weaknesses.
Polishing & Edge Profiling: Automated polishers enhance the surface shine, while CNC machines craft seamless edge finishes.
Water Absorption & Stain Resistance Tests: All engineered stones undergo lab testing to validate their non-porous nature and resistance to stains.

Custom Stone Fabrication (Cut-to-Size & Prefabs)

Precision Cutting & CNC Profiling: Each piece is cut with millimeter precision to match architectural specifications.
Hand Finishing & Detailing: Skilled craftsmen refine the final edges and textures to ensure perfect detailing.
Final Quality Inspection: A comprehensive final check ensures no surface defects, cracks, or inconsistencies before shipping.