Yapi&yapi Office | Udesign Architecture, in Istanbul, Turkey, is an office project credited to Interior Design: Udesign Architecture from 2021. We track workplace projects like this one for the same reason clients ask us about them: they want to know what still looks good after five years of daily use. To be clear: this is not a DIJA project, and we did not supply the material — it is included here purely as a documented reference.
Here is what the source material lists, application by application: ground floor cafe area, toilets, penthouse corri̇dor, penthouse executive rooms: silver shadow marble / isparta.
For silver shadow marble / isparta, the specified stone is one we stock directly: Travertine Silver Veincut.
The architect's own account, and the photography that goes with it, is one click away at the source link.