Looking for "black and gold" web design with "golden veins" for my digital marketing company

I’m just starting this company and need help with overall direction and design itself. Plans are ambitious as I want to create an entreprise-level company, so it should be crafted with this in mind. Domain name cointains “golden veins” and design should be around it (like black and gold marble texture). It should have luxury and high-class noble feel to it. If you are interested - please share your offer with portfolio, ideas and examples.