Yalın Architectural Design is behind Zonguldak Caves Visitor Center by Yalın Architecture (2021). It is not a DIJA project — we had no hand in supplying it — but the record is specific enough about materials to be worth reading.
The architects credited these specific applications: walls and roofing: limestone / zonguldak; parking floor coverings: granite.
For limestone / zonguldak, the closest thing we sell to it is Pietra Leccese. For granite, the nearest equivalent we stock is Black Galaxy Granite.
The original project write-up, with full photography and credits, is linked below — we do not reproduce it here, only the facts.