Natural stone is a record nature has accumulated over hundreds of millions of years. Even two blocks coming out of the same quarry are not exact copies of each other. This is the beauty of natural stone, but at the same time the greatest responsibility of supply. Architectural projects ask for the same vein as in the photograph. When the customer's spec arrives, our job is to find and bring out the lot closest to that spec from within the variability of nature. At Alpay Doğaltaş we carry out this task with three generations of family experience and our partner processing facilities.
The first step of quality control begins at the quarry. Before a block is even cut, it is read from its side surfaces. Vein direction, color transitions, crack traces, void probability can all be understood from the surface of the stone. In classic Marmara, whether the gray vein flows horizontally or vertically directly affects the surface look the customer wants. In Pure White, the availability of vein-free clean areas can be critical depending on the lot's intended use. In Panda, the ratio of dark to light tones determines the atmosphere of the project. This reading is not a technique learned from a book. It is the product of an eye accumulated over three generations of our family, which came from Sürmene to Saraylar in 1962.
After the block is selected, it is directed to partner processing facilities. Here, while the lot is being turned into slabs, the inspection process moves into its second stage. Whether the vein pattern laid on the slab surfaces captures the flow the customer wants, whether the slab thicknesses are consistent to millimeter precision, whether the edges are aligned are all checked together at this stage with a shared procedure. With our partners, we have a control language that has settled in over the years. They know our quality threshold, and we trust their measurement rigor. This mutual familiarity means that the lot passes through two separate sets of eyes before reaching the customer.
Dimensional control is one of the most frequently misunderstood topics in natural stone. When the customer's spec says 60 cm by 60 cm, there is a tolerance margin in actual production. Within which range this margin can fall for which product group is always agreed in advance. While dimensional consistency can be kept high in Dolomite and homogeneous marbles, in pronounced-pattern products like Pijama Ekvator the slabs are sometimes hand-selected to ensure vein harmony. In piece products such as White Dolomite Aggregate, the grain size distribution control comes into play. Knowing the specific inspection set of each product is the quiet knowledge of being a supplier.
