There is no country restriction — buyers and suppliers from anywhere in the world can join MarbleMap. The Country picker at sign-up lists every ISO country; you choose the one your company is registered in (it is auto-selected from your location, and you can change it).
The platform's centre of gravity today is Aegean stone moving into Europe and MENA. In practice that means quarries and processing plants on the supply side, and importers, architects and project firms on the buying side. That is where the trade currently flows, not a membership condition.
You pick the destination per demand: Delivery country is a required field in the New Demand wizard. In the advanced wizard, Acceptable supplier countries lets you narrow who may quote; leave it empty to accept offers from all countries.
Two things make cross-border work easier: in-demand messaging runs bilingually, so you and the other side each read in your own language, and offers priced in any of the 12 supported currencies are compared on a common EUR basis. Every business on the platform is operator-approved.
Also asked as: Can I join from outside Turkey? · Which countries does MarbleMap cover? · Can overseas suppliers quote? · Is there a country restriction on membership?