Services/ Sales ALTA QUARTZITE: A unique product in the 'niche' market. Alta Skiferbrudd B.V., the worldwide sales office for Alta Quartzite based in Eemshaven, The Netherlands, searches in every country in the world for architects and developers who seek to create exceptional projects. Alta Skiferbrudd works mainly with a "pull" marketing strategy, whereby marketing and sales efforts are directed towards architects. We encourage architects consult Alta Skiferbrudd or their domestic agent as early as possible on potential projects so complete and accurate information about the stone can be obtained at the crucial design phase.