Beyli̇kdüzü Fatma ana Cemevi̇ and Cultural Center, in İstanbul, Beylikdüzü, is a cultural project credited to 9016 Mimarlık (2016-2017). It is exactly the kind of building where a stone choice is meant to still look correct in fifty years, which makes the specification worth studying. 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.
Public documentation for this particular project does not break down the stone specification by room or surface — which happens more often than you would think, even for well-photographed buildings.
For gebze taşi, in the absence of a documented stone type, a reasonable regional equivalent from our range is Calacatta Oro.
We are not the right place to see this project's photography — that credit belongs at the source link below.