Hi Elena, this doesn't look like any of our Silestone colors so it is likely marble. We do, however, have Dekton Aura which has a similar look with the veining but is much more durable than marble!
http://www.dekton.co.uk/colours/aura-15/
Hi Elena this worktop is actually Corian!
Hi dRAW Architecture,
Is this not Neolith?
Cosentino North America
dRAW Architecture
Koliqi Marble Ltd